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Only two bytes are taken by every operating system access, in contrast to four or six when using regular jump instructions. The table used to look up the appropriate function is stored in RAM. Then, even if the underlying code was stored in ROM, it could still be overridden by replacing the ROM memory address with a RAM address.
The operating system is named after Monterey Bay, continuing the trend of releases named after California locations since 2013's 10.9 Mavericks. macOS Monterey is the final version of macOS that supports the 2015–2017 MacBook Air, Retina MacBook Pro, 2014 Mac Mini, 2015 iMac and cylindrical Mac Pro, as its successor, macOS Ventura, drops ...
"About This Computer" Mac OS 9.1 window showing the memory consumption of each open application and the system software itself. Historically, the classic Mac OS used a form of memory management that has fallen out of favor in modern systems. Criticism of this approach was one of the key areas addressed by the change to Mac OS X.
For example, an upgrade of RAM may not be compatible with existing RAM in a computer. Other hardware components may not be compatible after either an upgrade or downgrade, due to the non-availability of compatible drivers for the hardware with a specific operating system. Conversely, there is the same risk of non-compatibility when software is ...
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 ...
The release of Big Sur was the first time the major version number of the operating system had been incremented since the Mac OS X Public Beta in 2000. After sixteen distinct versions of macOS 10 ("Mac OS X"), macOS Big Sur was presented as version 11 in 2020, and every subsequent version has also incremented the major version number, similarly ...
Elon Musk and Vivek Ramaswamy, who were tapped by Republican President-elect Donald Trump to lead a new Department of Government Efficiency, have revealed plans to wipe out scores of federal ...
Apple bought Power Computing's Mac clone business for US$100,000,000 (equivalent to $189,800,995 in 2023) and gave their users free Mac OS 8 upgrade disks, ending the clone era. [24] Only UMAX ever obtained a license to ship Mac OS 8 and get Mac OS 8 upgrade disks, which expired in July 1998 (Power Computing also got Mac OS 8 disks by their ...