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Connectix products MAXIMA, RAM Doubler, and Virtual allowed accessing and reallocating the 6 MB addresses allocated to the NuBus cards for a total of 14 MB, minus 1 MB per slot occupied. [11] [12] Because memory was a scarce resource, the authors of Classic Mac OS decided to take advantage of the unused byte in each address.
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 support for those models. It is the last version of macOS that can run on Macs with 4GB of RAM.
Protected memory was only added to Macintosh computers with the release of the Mac OS X operating system. According to Andy Hertzfeld, the Macintosh used for the introduction demo on January 24, 1984, was a prototype with 512k RAM, even though the first model offered for sale implemented just 128k of non-expandable memory. This prototype was ...
The Macintosh Plus was the last classic Mac to have an RJ11 port on the front of the unit for the keyboard, as well as the DE-9 connector for the mouse; models released after the Macintosh Plus would use ADB ports. The Mac Plus was the first Apple computer to utilize user-upgradable SIMM memory modules instead of single DIP DRAM chips. Four ...
In operating systems, memory management is the function responsible for managing the computer's primary memory. [1]: 105–208 The memory management function keeps track of the status of each memory location, either allocated or free. It determines how memory is allocated among competing processes, deciding which gets memory, when they receive ...
The system software (Mac OS) was disk-based from the beginning, as RAM had to be conserved, but this "Startup Disk" could still be temporarily ejected. (Ejecting the root filesystem remained an unusual feature of the classic Mac OS until System 7.) One floppy disk was sufficient to store the System Software, an application and the data files ...
It is the earliest Macintosh model that can be used as an AppleShare server and, with a bridge Mac, communicate with modern devices. [3] The Mac 512K originally shipped with Macintosh System 1.1 but was able to run all versions of Mac OS up to System 4.1. It was replaced by the Macintosh 512Ke and the Macintosh Plus. All support for the Mac ...
This is also the first Power Macintosh with the "New World" architecture which contained a small (approximately 1 MB) boot ROM. When booting the Mac OS, the Mac OS Toolbox and any other ROM patches installed are loaded into RAM (the former Beige G3 however was the first Mac with this ROM-in-RAM capability).