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Last year, reports began to spread that Apple was planning to switch its computers from X86 to ARM architecture. Many caught on to the idea and began to see it as a step in the right direction. The thought of a Mac with an ARM processor made me roll my eyes. It is finally necessary to refute this nonsense with factual arguments.

There are basically three reasons for using ARM:

  1. Passive cooling
  2. Lower consumption
  3. Control over chip production

We'll take it in order. Passive cooling would certainly be a nice thing. Just start a flash video on the MacBook and the laptop will start an unprecedented concert, especially the Air has very noisy fans. Apple partially solves this problem. For the MacBook Pro with Retina, he used two asymmetric fans that reduce noise with different blade lengths. It is far from equal to the passive cooling of the iPad, but on the other hand, it is not such a big problem that it would be necessary to radically solve it by switching to ARM. Other technologies are also under development, such as noise reduction using reverse sound waves.

Probably the strongest argument is low energy consumption, ergo better battery life. Until now, Apple offered a maximum of 7 hours for MacBooks, which made them one of the most durable among the competition, on the other hand, the iPad's ten-hour endurance was definitely more attractive. But all that changed with the generation of Haswell processors and OS X Mavericks. Current MacBook Airs will offer a real endurance of around 12 hours, still on OS X 10.8, while Mavericks should bring even more significant savings. Those who have tried the beta report that their battery life has increased by up to two hours. So, if the 13″ MacBook Air could last 14 hours under normal load without any problems, it would be enough for almost two working days. So what good would a less powerful ARM be if it lost one of the advantages it had over Intel chips?

[do action=”quote”]What would be a reasonable reason to put ARM chips in desktops when all the advantages of the architecture only make sense in laptops?[/do]

The third argument then says that Apple would gain control over chip production. He attempted this journey in the 90s, and as we all know, it turned out infamously. Currently, the company designs its own ARM chipsets, although a third party (mostly Samsung at the moment) manufactures them for it. For Macs, Apple is dependent on Intel's offering and has virtually no advantage over other manufacturers, except that the latest processors are available to it before its competitors.

But Apple is already several steps ahead. Its main revenue comes not from the sale of MacBooks and iMacs, but from iPhones and iPads. Although is the most profitable among computer manufacturers, the desktop and notebook segment is stagnating in favor of mobile devices. Because of more control over the processors, the effort of changing the architecture would not be worth it.

However, what many overlook are the problems that would accompany a change in architecture. Apple has already changed architecture twice in the last 20 years (Motorola > PowerPC and PowerPC > Intel) and it certainly wasn't without difficulty and controversy. In order to take advantage of the performance that Intel chips offered, developers had to rewrite their applications from the ground up, and OS X had to include the Rosetta binary translator for backward compatibility. Porting OS X to ARM would be quite a challenge in itself (although Apple has already achieved some of this with iOS development), and the idea of ​​all developers having to rewrite their apps to run on a less powerful ARM is quite scary.

Microsoft attempted the same move with Windows RT. And how did he do? There is minimal interest in RT, both from customers, hardware manufacturers, and developers. A great practical example of why a desktop system just doesn't belong on ARM. Another argument against is the new Mac Pro. Can you imagine Apple getting similar performance on an ARM architecture? And anyway, what good reason would there be to put ARM chips in desktops when all the advantages of the architecture only make sense in laptops?

Anyway, Apple has it clearly divided: Desktop computers and laptops have a desktop operating system based on the x86 architecture, while mobile devices have a mobile operating system based on ARM. As recent history has shown, finding compromises between these two worlds does not meet with success (Microsoft Surface). Therefore, let's bury once and for all the idea that Apple will switch from Intel to ARM in the near future.

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