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The final version of [[Mac OS X]] that ran on PowerPC processors was [[Mac OS X Leopard|Leopard]], released in October 2007, with PowerPC binary translation support (using [[Rosetta (software)|Rosetta]]) persisting up through the following version, [[Mac OS X Snow Leopard|Snow Leopard]].<ref>{{cite press release | url=https://www.apple.com/newsroom/2008/06/09Apple-Previews-Mac-OS-X-Snow-Leopard-to-Developers/ | title=Apple Previews Mac OS X Snow Leopard to Developers | publisher=[[Apple Inc.|Apple]] | date=June 9, 2008 | access-date=2017-12-04 | archive-date=November 1, 2017 | archive-url=https://web.archive.org/web/20171101112448/https://www.apple.com/newsroom/2008/06/09Apple-Previews-Mac-OS-X-Snow-Leopard-to-Developers/ | url-status=live }}</ref> Support was later dropped in [[Mac OS X Lion|Lion]].
In 2020, Apple announced that it would [[Mac transition to Apple silicon|shift its Mac line to Apple silicon]], which are [[ARM architecture|ARM]]-based
==Background==
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==History==
===1980s===
Apple's efforts to move to Intel hardware began in 1985.
===1990s===
In the 1990s, Intel often took out ads in ''[[Macworld]]'' convincing Macintosh users to switch to PCs powered by Intel CPUs.<ref>{{cite
The first known attempt by Apple to move to Intel's platform was the [[Star Trek project]], a code name given to a secret project to run a port of [[Classic Mac OS]] [[System 7]] and its applications on an Intel-compatible personal computer.
Apple leaders set an October 31 deadline to create a working prototype. The team met that deadline, and had a functional demo ready by December. [[John Sculley]]'s departure during the Star Trek project was a factor in the project's termination. [[Michael Spindler]], who took over as Apple's CEO, instead devoted most of Apple's resources to
After Apple's 1997 acquisition of [[NeXT]], Apple began to rework their [[NeXTSTEP]] operating system into a successor to the classic Mac OS, codenamed [[Rhapsody (operating system)|Rhapsody]]. Jobs (who rejoined Apple upon the purchase) demonstrated an Intel-compatible build of Rhapsody to [[Dell]] founder and namesake [[Michael Dell]]. Jobs offered to license the new OS to Dell for its PCs, so that users could choose between it and [[Microsoft Windows|Windows]]. However, Dell declined when Jobs insisted that the company license the operating system for every PC it ships, regardless of whether or not the user wanted to use Mac OS.<ref>{{Cite web|last=Guglielmo|first=Connie|title=The Apple-Dell deal that could have changed history|url=https://www.cnet.com/tech/computing/the-steve-jobs-deal-with-dell-that-could-have-changed-apple-and-tech-history/|access-date=2021-10-29|website=CNET|language=en|archive-date=October 29, 2021|archive-url=https://web.archive.org/web/20211029173341/https://www.cnet.com/tech/computing/the-steve-jobs-deal-with-dell-that-could-have-changed-apple-and-tech-history/|url-status=live}}</ref>
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It was noted in 2003 by IBM in an article published to its [[intranet]] that Apple felt a transition to Intel would present massive software changes that it wanted to avoid.<ref>{{cite news |last1=Kim |first1=Arnold |title=IBM on Apple/Intel and the G5 |url=https://www.macrumors.com/2003/09/12/ibm-on-apple-intel-and-the-g5/ |access-date=24 June 2020 |work=[[MacRumors]] |date=12 September 2003 |archive-date=October 20, 2020 |archive-url=https://web.archive.org/web/20201020005737/https://www.macrumors.com/2003/09/12/ibm-on-apple-intel-and-the-g5/ |url-status=live }}</ref> Nevertheless, rumors of an impending announcement of a transition to Intel cropped up in 2000 and 2003.<ref name="MacRumors1">{{cite news |last1=Kim |first1=Arnold |title='Intel Based Mac' Rumor Roundup... [Updated x2] |url=https://www.macrumors.com/2005/06/05/intel-based-mac-rumor-roundup/ |access-date=25 June 2020 |work=[[MacRumors]] |date=4 June 2005 |archive-date=October 31, 2020 |archive-url=https://web.archive.org/web/20201031220502/https://www.macrumors.com/2005/06/05/intel-based-mac-rumor-roundup/ |url-status=live }}</ref>
Sculley said in 2003 that not choosing Intel for Apple was "probably one of the biggest mistakes I've ever made". Apple did not foresee Intel's ability to improve x86's [[complex instruction set computing|CISC]] architecture to match [[RISC]], and did not have access to commodity x86 components to compete on price with rivals like [[Dell]], he said.<ref name="forbes20031009">{{Cite magazine |date=2003-10-09 |title=Ex-Apple CEO Regrets Nixing Intel |url=https://www.forbes.com/2003/10/09/1009intelpinnacor.html |access-date=2025-06-28 |magazine=Forbes |language=en}}</ref>
===2005===
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Some observers expressed surprise that Apple made a deal with Intel instead of with [[AMD]].<ref name="MacWorld1">{{cite news |last1=McLaughlin |first1=Laurianne |title=Analysis: Why Apple picked Intel over AMD |url=https://www.macworld.com/article/1046961/intelvsamd.html |access-date=24 June 2020 |work=[[MacWorld]] |date=14 September 2005 |archive-date=October 24, 2020 |archive-url=https://web.archive.org/web/20201024040545/https://www.macworld.com/article/1046961/intelvsamd.html |url-status=live }}</ref> By 2005, AMD had become popular with gamers and the budget conscious,<ref name="MacWorld1"/> but some analysts believed AMD's lack of low-power designs at the time was behind Apple's decision to go with Intel.<ref name="MacWorld1"/>
In 2011, Apple investigated using AMD's low power [[AMD Fusion#Llano .2832.C2.A0nm.29 2|Llano APU]] for the [[MacBook Air]], but eventually opted for Intel due to AMD's potential inability to supply enough Llano processors to meet demand.<ref>{{cite web |url=http://www.semiaccurate.com/2011/11/17/apple-macbook-air-with-amd-processor-dead/ |title=Exclusive: Apple MacBook Air with AMD processor dead |date=2011-11-17 |publisher=[[SemiAccurate]] |access-date=December 31, 2012 |archive-date=January 31, 2013 |archive-url=https://web.archive.org/web/20130131005152/http://www.semiaccurate.com/2011/11/17/apple-macbook-air-with-amd-processor-dead/#.UQnAMC_P32c |url-status=live }}</ref>
===32-bit regression===
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The [[Classic environment]], the [[Mac OS 9]] virtualization measure for Mac OS X, was not ported to the x86 architecture,<ref>{{cite web |title=Why doesn't Apple support MacOS 9/Classic on Intel-based Macs? |url=https://everymac.com/mac-answers/mac-os-9-classic-support-faq/why-did-apple-abandon-macos-9-classic.html |website=EveryMac.com |access-date=23 June 2020 |date=12 July 2006 |archive-date=April 3, 2019 |archive-url=https://web.archive.org/web/20190403193212/https://everymac.com/mac-answers/mac-os-9-classic-support-faq/why-did-apple-abandon-macos-9-classic.html |url-status=live }}</ref> leaving the new Intel-powered Macs incompatible with [[classic Mac OS]] applications without a proper third-party PowerPC emulator.
There were also concerns over third-party software support, with reaction to the change being mixed amongst the software developer community, due to a need to recompile software for compatibility on Intel-based Macs.<ref name="SanJoseMercuryNews1"/> In early 2006, it was reported that a number of software companies, such as [[Adobe Inc.|Adobe]], [[Aspyr]] and [[Microsoft]], were not ready to release [[universal binary]] versions of their software offerings.<ref>{{cite news |last1=Shimpi |first1=Shimpi |title=Apple Makes the Switch: iMac G5 vs. iMac Core Duo |url=https://www.anandtech.com/show/1936 |access-date=24 June 2020 |work=AnandTech |date=30 January 2006 |archive-date=July 26, 2020 |archive-url=https://web.archive.org/web/20200726071220/https://www.anandtech.com/show/1936 |url-status=
===Technical issues===
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* [[Star Trek project]]
* [[Universal binary]]
* [[Mac transition to PowerPC processors]]
* [[Mac transition to Apple silicon]]
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