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The history of macOS, Apple's current Mac operating system formerly named Mac OS X until 2011 and then OS X until 2016, began with the company's project to replace its "classic" Mac OS. That system, up to and including its final release Mac OS 9 , was a direct descendant of the operating system Apple had used in its Mac computers since their ...
Backporting is the action of taking parts from a newer version of a software system or software component and porting them to an older version of the same software. It forms part of the maintenance step in a software development process, and it is commonly used for fixing security issues in older versions of the software and also for providing new features to older versions.
macOS Sonoma (version 14) is the twentieth major release of macOS, Apple's operating system for Mac computers. The successor to macOS Ventura , it was announced at WWDC 2023 on June 5, 2023, [ 3 ] and released on September 26, 2023.
Note that most old programs can still be run using emulators, such as SheepShaver, vMac, or Basilisk II. For a list of current programs, see List of Mac software . Third-party databases include VersionTracker , MacUpdate and iUseThis .
macOS Sequoia (version 15) is the twenty-first and current major release of Apple's macOS operating system, the successor to macOS Sonoma. It was announced at WWDC 2024 on June 10, 2024. [ 4 ] In line with Apple's practice of naming macOS releases after landmarks in California , it is named after Sequoia National Park , located in the Sierra ...
Mac OS X Panther: October 24, 2003 Version 10.3; Macintosh computers (PowerPC and x86) Mac OS X Tiger: April 29, 2005 Version 10.4; Mac OS X Leopard: October 26, 2007 Version 10.5; Macintosh computers Mac OS X Snow Leopard: August 28, 2009 Version 10.6; Mac OS X Lion: July 20, 2011 Version 10.7; Also marketed as OS X Lion; OS X Mountain Lion ...
Intel-based Macs would run a new recompiled version of OS X along with Rosetta, a binary translation layer which enables software compiled for PowerPC Mac OS X to run on Intel Mac OS X machines. [130] The system was included with Mac OS X versions up to version 10.6.8. [131] Apple dropped support for Classic mode on the new Intel Macs.
In computing, downgrading refers to reverting software (or hardware) back to an older version; downgrade is the opposite of upgrade. Programs may need to be downgraded to remove introduced bugs, restore useful removed features, and to increase speed and/or ease of use. The same can occur with machinery.