![]() ![]() June 2018: All new apps and updates to existing apps submitted to the Mac App Store need to be 64-bit only.Īpple hasn’t clarified what “without compromise” means, and presumably 32-bit apps from outside the Mac App Store will continue to run for at least the next year or two (if only via some kind of Rosetta-esque downloadable compatibility layer).January 2018: All new apps submitted to the Mac App Store need to be 64-bit only.High Sierra will, in Apple's own words, be the last macOS release that can support 32-bit macOS apps “without compromise.” And for apps distributed through the Mac App Store, there are two new dates to add to the timeline: Advertisement Even in High Sierra, as of this writing, all of Apple’s code is 64-bit-but you can continue to develop and run 32-bit apps as long as there’s not some other compatibility problem.īut this is the beginning of the end. That said, OS X can still run 32-bit apps. In the process, a few 64-bit systems with 32-bit graphics drivers and 32-bit EFIs are dropped from the support list. July 2012: OS X 10.8 Mountain Lion boots into the 64-bit kernel by default on all systems that support it, including a few that previously defaulted to the 32-bit kernel.Older Macs continue to default to the 32-bit kernel and 32-bit drivers, but new Macs launched in this era typically default to the 64-bit kernel. July 2011: Mac OS X 10.7 Lion drops support for 32-bit Intel CPUs (Snow Leopard had already ended all support for PowerPC systems).Snow Leopard’s 64-bit capabilities are a major component of Apple’s marketing push, which infamously includes “ no new features.” However, most systems still default to loading the 32-bit kernel. August 2009: Mac OS X 10.6 Snow Leopard still runs on 32-bit chips, but for the first time everything from the apps to the OS kernel supports 64-bit operation.Unlike Windows, Apple never ships separate 32- and 64-bit versions of Mac OS X. October 2007: Mac OS X 10.5 Leopard launches with actual support for regular 64-bit apps Universal Binaries can run on 32-bit and 64-bit Intel and PowerPC machines, covering four architectures within a single app.August 2006: Apple launches the Intel Mac Pro with a 64-bit Woodcrest CPU mainstream 64-bit Core 2 Duo Macs follow shortly afterward.June 2005: Apple announces that it will begin using Intel processors, which are still primarily 32-bit.April 2005: Mac OS X 10.4 Tiger allows for 64-bit processes under-the-hood-they can be spun off from another process or run via the Terminal.June 2003: The PowerPC G5 CPU is the first 64-bit-capable chip to show up in a Mac, and with Mac OS X 10.3 Panther can theoretically address up to 8GB of RAM. ![]() It’s nicely situated between the nitty-grittiness of the specific WWDC sessions and the bird’s-eye overview you get in the general keynote, and it’s always full of interesting tidbits.īuried in that presentation this year was news about the next phase of the macOS transition from 32-bit to 64-bit, a process that has been much longer and messier for the Mac than it was for iOS. Apps and features will be easier to navigate, especially in Photos, and Siri is getting an overhaul designed to let it understand users better as well as speaking less robotically.After the main blockbuster WWDC keynote, Apple does a big “ Platforms State of the Union” presentation aimed more specifically at the gathered audience of developers. The updated operating system will also bring a new version of the Metal API (designed to make games run faster), a new sidebar and editing tools in the Photos app, and will allow developers to create interactive virtual reality experiences on Macs. Mac OS High Sierra will deliver a number of new features to Mac computers, including a new Apple File System (it replaces the old one, called HFS Plus), which will streamline chores like duplicating files and finding specific ones. To run it, you’ll need a MacBook or iMac computer released in late 2009 or newer, a MacBook Pro, Mac Mini or Mac Pro released mid-2010 or newer, a MacBook Air released in late 2010 or newer, or an iMac Pro released in 2017. MacOS High Sierra will work with these computersĪpple’s new macOS High Sierra operating system has the same requirements as macOS Sierra: it’s compatible with Apple computers introduced in either late 2009, mid-2010 or later.
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