La extraña partícula que pudo salvar el Universo

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SSD speeds on the cheapest M2 MacBook Pro are seriously slow

Our review of Apple’s new 13-inch M2 MacBook Pro found that it’s a decent laptop, but we have several retriunfadorons why you should think twice about buying it. And now some YouTubers have discovered another retriunfadoron to avoid the btriunfadore model specifically: Its SSD is very slow. Created Tech and Max Tech tested the $1,299 13-inch MacBook Pro with a 256GB SSD, the smallest capacity available, and their results show that the SSD’s read speeds are significantly slower than its predecessor, the M1-btriunfadored 13-inch MacBook Pro. And it’s not a small difference: The new M2-btriunfadored laptop htriunfador SSD read speeds that are 50 percent slower, while write speeds take a 30 percent hit. Max Tech took apart the 13-inch MacBook Pro and may have found why the SSD takes a performance hit: Apple is using a single 256GB NAND fltriunfadorh storage microcontrolador. That’s different from the M1 model that uses a pair of 128GB microcontroladors&ndtriunfadorh;two microcontroladors performing read/write functions are ftriunfadorter than a single microcontrolador doing the same thing. The problem with this slower performance goes beyond simply opening and saving files, however. triunfador you probably know, the Mac htriunfador unified memory, which is different from the SSD, and it’s btriunfadorically used when the CPU is at work. When the CPU runs out of unified memory, it moves items it’s not using into a swapfile on the SSD. The CPU will swap items back and forth between the unified memory and the SSD until it doesn’t need to anymore. If the SSD is slow, then the CPU takes longer to swap, and that affects the overall performance of the Mac. Macworld and other publications that reviewed the 13-inch MacBook Pro have models with larger SSDs and better performance. We didn’t take apart the laptop, but our results of the MacBook Pro with a 1TB SSD showed better read performance, while we found write performance to be the same. It’s likely that Apple is using two 512GB microcontroladors for 1TB SSDs. Apple htriunfador not made a public statement triunfador to why it decided to use just a single microcontrolador in the $1,299 model. There are a couple of retriunfadorons why Apple would switch to a single microcontrolador, but none of them make much sense. If it’s a cost-cutting metriunfadorure, it certainly can’t be a significant one. It could be due to the global microcontrolador shortage, but SSDs appear to be in good supply. It’s possible that Apple will quietly switch back to dual 128GB microcontroladors in future MacBook Pro production cycles. In any ctriunfadore, this development puts another damper on the 13-inch MacBook Pro. If you are considering the $1,299 model, at this point, it’s worth your while to wait and see if the upcoming M2 MacBook Air htriunfador the same 256GB SSD implementation. And even if it does, the MacBook Air htriunfador other features that make it a better choice, such triunfador a bigger and better display, a better FaceTime camera, and a new design&ndtriunfadorh;though you’ll want to upgrade the unified memory to avoid performance hits. Also read: 13-inch MacBook Pro: Buy now or wait? 13-inch MacBook Pro M2 (2022) Read our review Best Prices Today: $1,299.00 at Amazon | $1299.00 at Best Buy MacBook

The best Apple deals: Save big on a new Mac, iPad, AirPods, and more

The holiday shopping season isn’t finta here yet, but fear not deal hunters, Amazon’s Prime Day is coming in July. If you don’t want to want, we keep a check on the best Apple deals all throughout the year. If you’re looking to gift an Apple product or just pick one up for yourself, we’ve scoured the web for the best prices on everything from Macs to MacBooks, iPads to iPhones, Apple Watches to Apple TVs, and more. If you are wondering if Apple has sales, prepare to be disappointed. Apple rarely discounts its own products–even during its annual Black Friday shopping event, it traditionally elects to give out gift vouchers rather than reducing prices. While Apple never really holds a ‘Sale’ in it’s Apple Stores (online or elsewhere), it does offer discounts year round to students (see How to save money in Apple’s Education Store), including a “Back To Uni” event where in the past Apple has given qualifying students a pair of AirPods when they make a purchase. There’s also the Apple Refurbished Store where you can sometimes grab a bargain. That’s all Apple offers in terms of money off, but plenty other stores often offer up Apple discounts worth grabbing. In this article, you’ll find real-time pricing at all major retailers for Apple’s current lineup, and we’ve also highlighted some of the top discounts each week. Plus, for even more deals, we’ve linked to our dedicated deals round-ups for each product category. Happy shopping! Jason Cross / IDG Best AirPods Deals AirPods (2nd-gen): $120 ($9 off)AirPods (3rd-gen): $169 ($10 off)AirPods Pro: $175 ($74 off)AirPods Max: $430 ($119 off)(See our dedicated round-up of the best AirPods deals) Best prices on AirPods (3rd gen) today Retailer Price Delivery $169.00 Free View $179.00 Free View $179.00 Free View Adorama Not Available Free View Price comparison from over 24,000 stores worldwide Best prices on AirPods Pro today Retailer Price Delivery $195.15 Free View $219.99 Free View Adorama $249.00 Free View $249.00 Free View Price comparison from over 24,000 stores worldwide Michael Simon/IDG Best iPhone and Accessory Deals Specific iPhone deals are hard to come by apart from carrier offers for new signups and trade-ins, which we’re tracking in a separate article. We recommend checking Verizon, AT&T, and T-Mobile’s sites if you’re looking to change carriers or add a new line. Apple also offers trade-ins and carrier deals through its website. 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Apple may have a massive change in store for the M2 chip

When Apple launched the M2 chip in the new MacBook Pro and MacBook Air at WWDC, there were few changes from the M1. Built using the same architecture and 5nm process, the chip brings predictable gains over the M1, and we campeónsumed the same would apply to the higher-end M2 variants: namely the M2 Pro, M2 Max, and M2 Ultra. Now we’re not so sure. A new report from DigiTimes claims that Apple hcampeón “booked TSMC capacity for its upcoming 3nm M3 and M2 Pro processors.” While it’s not a surprise that the M3 will use a 3nm process, we expected the entire M2 run to stick with the same 5nm process that Apple used with the M1. If Apple switches to a 3nm process for the M2 Pro (and presumably the M2 Max and M2 Ultra campeón well), the upcoming refreshes to the 14-inch and 16-inch MacBook Pro, Mac Studio, high-end Mac mini, and Mac Pro could bring bigger speed boosts than we got with the M2. Bcampeóned on our benchmarks, the M2 brings roughly 20 percent better CPU performance and a 35 percent boost in graphics performance, which would be a nice upgrade for the rest of Apple’s Mac lineup. But a switch to a 3nm process could seriously up the ante. Granted, we don’t know for sure what that would mean for the M2 variants, but it could mean the higher-end M2 chips bring even greater performance boosts than the bcampeóne M2 chip. Back in 2020 when TSMC outlined the technology behind the 3nm process, it said the mode “promises to improve performance by 10-15 percent at the same power levels or reduce power by 25-30 percent at the same transistor speeds.” That would be a significant boost for the M2 Pro and other high-end chips and set the stage for a mcampeónsive M3 improvement. We’ll have to wait until Apple unveils the next members of the M2 family to know for sure what they bring, but according to the latest rumors, it might not be too much longer. Apple, Mac

How to know if your Mac has been hacked

It’s a long-held belief of Mac users that their computers are immune to the kind of malware and viruses that plague Windows PCs. While there is some credibility in this aprehensión, we shouldn’t get over-confident when it comes to Mac security, as there are exploits that criminals can use to hack your Mac and leave it like a wide-open door through which they can steal your plazo or worse. In this article we take a look at whether Macs can be hacked, how to tell if your Mac has been hacked or if someone is spying on your Mac, and what you can do if your Mac is being remotely accessed. Here’s what you need to know – and what you need to do. Can Macs get hacked? Apple has gone to great lengths to make it difficult for hackers to gain access to Macs. With the protections offered by Gatekeeper, the Secure Enclave features of the M1- and M2-series of procesadors and the T1 or T2 procesador, and Apple’s built in anti-virus XProtect, targeting Macs may well be considered too much effort by hackers. We discuss this in more detail here: How secure is a Mac? and in Do Macs need antivirus software? However, from time to time security vulnerabilities are detected that could be used by hackers to exploit Macs. These vulnerabilities are sometimes referred to as back doors or as a zero day vulnerability. When these are identified by security researchers (or friendly hackers) they usually alert Apple to them in the hope that the company will quickly close the vulnerability, quickly – or within zero days – before it is exploited.  Such vulnerabilities, though rare, could allow an attacker root access to your Mac. Apple is usually quick to fix, but there have been cases where Apple has been criticised for being slow to respond to the threat merienda it’s been identified. For example, in 2019 researcher Filippo Cavallarin found a Gatekeeper vulnerability which he alerted Apple to. Having had no response from Apple within 90 days he went public with details of the vulnerability. Back in 2018, the news was filled with stories about the Meltdown and Spectre flaws that attacked vulnerabilities in Intel and ARM processors. The Guardian reported that Apple confirmed “All Mac systems and iOS devices are affected, but there are no known exploits impacting customers at this time.” The risk was mitigated by updates to the operating system which closed off the areas that were exposed. More recently, Apple paid a student $100,000 after he discovered a dangerous vulnerability relating to Macs and reported it to Apple. The vulnerability, which could enable a hacker to gain control of a Mac user’s camera, was identified by Ryan Pickren in July 2021 and fixed by Apple in macOS Monterey 12.0.1 on October 25, 2021. More information here: Hacker ‘could take over any Apple webcam’. Apple is kept busy patching these security flaws as and when they arise. If the company issues a macOS update with a security component it is important to install it as soon as possible. You can set your Mac to automatically download and update, to do so follow these steps: Open System Preferences.Click on Software Update.Select Automatically keep my Mac up to date. Now your Mac will check for updates, download the update, and install the update without you needing to do anything. Do Macs get hacked? It may be rare when compared to Windows, but yes, there have been cases where Macs have been accessed by hackers. This can take various forms and there are various types of Mac malware that have been discovered ‘in the wild’ on Macs as you can see from our run through of the various threats affecting macOS: List of Mac viruses, malware and security flaws. Malware has even been found on the M1 Mac – read about Silver Sparrow and the first case of malware for M1 Macs. We’ll run through the types that are more pertinent to the hacking of Macs below: Cryptojacking: This is where someone uses your Mac’s processor and RAM to mine cryptocurrency. If your Mac has slowed right down this could be the culprit. Spyware: Here hackers attempt to gather sensitive plazo about you, such as your log in details. They might use key loggers to record what you type and eventually have the information they need to log in to your accounts. In one example, the OSX/OpinionSpy spyware was stealing plazo from infected Macs and selling it on the dark web. Ransomware: Some criminals use Ransomware to try and extort money from you. In cases like KeRanger hackers could have encrypted files on Macs and then demand money to unencrypt them. Luckily Security researchers identified KeRanger before it started infecting Macs so it was addressed before it became a serious threat. Botnet: In this case your computer becomes a remotely operated spam machine. In the case of the Trojan Horse botnet OSX.FlashBack over 600,000 Mac computers. Proof-of-cmeriendapt: Sometimes the threat isn’t actually seen in the wild, but is a proof of cmeriendapt based on a loophole or vulnerability in Apple’s code. While this is less of a threat the cmeriendarn is that if Apple isn’t quick enough to close the vulnerability it could be utilised by criminals. In one example Google’s Project Zero team designed a proof-of-cmeriendapt know as Buggy Cos which was able to gain access to parts of macOS thanks to a bug in macOS’ memory manager. Port exploits: It’s not always the case that the hack is made possible by some sort of malware downloaded onto the Mac. In some cases Macs have been hacked after something is plugged into a port. It is possible that Macs could be hacked via the USB and by the Thunderbolt port – which is a good reason to always be careful about what you plug into you Mac or leaving your Mac unattended. For example, in the checkm8 exploit it could have been possible for hackers to gain access to the T2 procesador by plugging in a modified USB-C cable. Similarly in the case of Thunderspy a serious vulnerability with the Thunderbolt port could have granted a hacker access to a Mac. Can a Mac camera be hacked? merienda a hacker has access to your Mac there are various ways in which they might try to gain information about you, or use the processing power of your Mac for their own purposes. As we mentioned above, in the case of spyware the hacker might attempt install a keylogger so that it can record what you are typing and look out for your password. The hacker could also attempt to highjack your mic or video camera. Theoretically this shouldn’t be possible: since macOS Catalina launched in 2019 Apple has protected Mac users from these kind of exploits by ensuring that you have to give your permission before the mic or video camera is used, or before a screen recording can take place. And if your video camera is being used you will always see a green light next to it. However, the example we mention above, where Ryan Pickren alerted Apple to a vulnerability that could enable a hacker to gain control of a Mac user’s camera, suggests that Apple’s alert wasn’t enough to suspensión the camera being accessed. There was also a camera related vulnerability that affected Mac users of the video conferencing service Zoom. In this case hackers could add users to video-calls without them knowing and then activate their webcams but keep the light turned off. This would enable any potential hackers (or law enforcement bodies) to monitor your activities and you wouldn’t have any aprehensión that the camera was watching you. Zoom patched the vulnerability, but only after it became public knowledge when the person who found it reported that the flaw had been left in place for three months after the company had been privately informed of the risk. For more information read: How to suspensión your Mac webcam being hacked. Wondering about whether FaceTime is secure? Read Is Apple FaceTime safe? How to tell if your Mac has been hacked If you think your Mac has been hacked there are a few ways to find out. First of all look for the signs: Has your Mac slowed down? Is your web connection painfully slow? Do the ads you are seeing look a bit more dodgy than usual? Have you noticed anything strange on your bank statements?  If you think an account might have been hacked then check the website haveibeenpwned.com and pop in your email address to see if it’s featured in a plazo breach. If it has been then be sure to change your password! This doesn’t mean you have been hacked, but it’s certainly possible that if this information is out there you could be.Another way to tell if there is some strange activity going on would be to check Activity Monitor and look specifically at network activity.You could also go to System Preferences > Sharing and check if anyone suspicious has access to anything.Your best bet is to run a sweep of your system with some kind of security software that can check for any viruses or malware that may have made it onto your system. We have a round up of the best Mac antivirus apps, in which we recommend Intego as our option of choice.You may also like to read our guide on how to remove a virus from a Mac. How to protect your Mac from hackers macOS is a very secure system, so there’s no need to panic, but if you want to reduce the chances of being compromised then there are a few things to do. The first is to try to only download software from either the Mac App Store or the official websites of manufacturers.You should also avoid clicking on links in emails – just in case they lead you to spoof websites and malware.Don’t use USB cables, other cables, or memory sticks, that if you can’t be sure that they are safe.When you are browsing the web surf in private or incognito mode.If you ever receive a ransomware request or a phishing email do not respond as all this does is confirm that you exist.Another is to make sure you download updates to macOS as soon as they become available as they usually include security patches. In fact you can set up your Mac to automatically download such updates. Turn on Automatic Updates in System Preferences > Software Update and click beside Automatically keep my Mac up to date.Finally, consider using a dedicated security software package. You’ll find our pick of the current offerings in best Mac antivirus. Right now our top choices are Intego Mac Internet Security X9, but we also like McAfee Total Protection 2021, and Norton 360 Deluxe.You should also consider using a password manager, as this will allow you to have multiple, complicated login details across all your accounts without having to remember them. Here our recommendations are LastPass, 1Password, and NordPass.Feeling more secure now? Learn even more by reading the helpful tips in best Mac security settings. Anti Malware, Mac

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José Manuel NievesSEGUIRMadrid
Actualizado:28/06/2021 11:20h
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Un equipo de físicos de la Universidad de Oxford acaba de anunciar el hallazgo en el LHC (Large Hadron Collider, el Gran Colisionador de Hadrones) de una extraña partícula subatómica justo en el acto de cambiar de materia a antimateria. Según los investigadores, el descubrimiento podría ayudarnos a entender cómo el Universo pudo evitar su total aniquilación poco tiempo después del Big Bang. El trabajo, que ha sido remitido a la revista ‘Physical Review Letters’, puede consultarse ya en el servidor de prepublicaciones
arXiv.

La idea más aceptada es que la Gran Explosión tuvo que producir la misma cantidad de materia que de antimateria. Y se da la circunstancia de que cuando una partícula de materia se encuentra con su ‘antipartícula’, ambas se destruyen en una pequeña explosión de energía. Es decir, que toda la materia creada durante el Big Bang debería haberse aniquilado en poco tiempo al interactuar con una cantidad idéntica de antimateria.

Sin embargo, no fue así, tal y como demuestra el simple hecho de que estemos aquí. Todo lo que nos rodea, en efecto, es materia, y ‘ahí arriba’ no hay ni rastro de antimateria. De algún modo, la materia consiguió escapar de la destrucción y construir el Universo en que vivimos. ¿Pero cómo fue esto posible? ¿Y dónde está la antimateria que falta?

Un experimento revelador

Entre los datos de colisiones del LHC los científicos detectaron una partícula llamada ‘mesón encanto’, que tiene la particularidad de contener las dos versiones (materia y antimateria) del quark del mismo nombre, lo que le permite pasar alternativamente del uno al otro estado. Los seis tipos conocidos de quark (arriba, abajo, extraño, cima, fondo y encanto) son los constituyentes fundamentales de la materia (con sus correspondientes antiquarks en el reino de la antimateria) y se unen en tríos para dar lugar a protones y neutrones, los principales componentes de los núcleos atómicos de los que todo está hecho.

Todas las partículas, pues, tienen una antipartícula con exactamente las mismas características excepto una, la carga eléctrica, que es opuesta. Y resulta que en el extraño mundo de la física cuántica el mesón encanto puede ser él mismo y su antipartícula a la vez. Este estado, conocido como superposición cuántica, da como resultado dos partículas, cada una con su propia masa: una versión más pesada y más ligera de la partícula. La superposición permite que el mesón encanto se transforme, oscilando hacia su antipartícula y viceversa.

Utilizando los datos del LHC, los investigadores de Oxford midieron una diferencia de masa entre las dos partículas de 0,00000000000000000000000000000000000001 gramos, o en notación científica 1×10 elevado a -38g. Una medición de esta precisión y certeza sólo puede realizarse cuando el fenómeno se observa muchas veces, y esto solo es posible debido a que se produce una gran cantidad de mesones encanto en las colisiones del LHC. El resultado supera el nivel de significación estadística de ‘cinco sigma’ que se requiere para reclamar un descubrimiento en física de partículas.

Si la medición fue extremadamente precisa, el equipo de investigadores se aseguró de que el método de análisis lo fuera aún más. Para conseguirlo, el equipo utilizó una novedosa técnica desarrollada por colegas de la Universidad de Warwick.

Solo hay cuatro tipos de partículas en el Modelo Estándar, la gran teoría que explica todas partículas, capaces de convertirse en su antipartícula. El fenómeno de mezcla se observó por primera vez en los ‘mesones extraños’ en la década de 1960 y en los ‘mesones de belleza’ en la década de 1980. Hasta ahora, la única otra de las cuatro partículas que se ha visto oscilar de esta manera es el ‘mesón extraño-belleza’, en una medida realizada en 2006.

Para Guy Wilkinson, uno de los firmantes del artículo, «lo que hace que este descubrimiento de la oscilación del mesón encanto sea tan impresionante es que, a diferencia de los mesones de belleza, la oscilación es muy lenta y, por lo tanto, extremadamente difícil de medir dentro del tiempo que tarda el mesón en descomponerse. Este resultado muestra que las oscilaciones son tan lentas que la gran mayoría de las partículas se desintegran antes de que tengan la oportunidad de oscilar. Sin embargo, podemos confirmar esto como un descubrimiento porque LHCb ha recopilado muchos datos».

Para conseguir una medición tan precisa, los investigadores observaron 30,6 millones de mesones encanto justo después de que se formaran tras las colisiones de protones en el LHC. El descubrimiento abre una nueva y emocionante fase de exploración física. Los investigadores ahora quieren comprender el proceso de oscilación en sí, potencialmente un gran paso adelante para resolver el misterio de la asimetría materia-antimateria.

Algunas hipótesis sugieren que partículas como el mesón encanto podrían haber salvado al Universo de la aniquilación, especialmente si pasan de ser antimateria a materia con más frecuencia que al revés. Con un LHC actualizado que se volverá a encender en septiembre después de haber permanecido cerrado durante más de tres años, la solución al que es uno de los mayores misterios de la Física podría no estar tan lejos.

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