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Mac OS X finally did away with the whole scheme, implementing a modern paged virtual memory scheme. A subset of the older memory model APIs still exists for compatibility as part of Carbon, but maps to the modern memory manager (a thread-safe malloc implementation) underneath. [6] Apple recommends that Mac OS X code use malloc and free "almost ...
iMac (Late 2013) 2.7–3.5 4×256 4–6 — 4 No Yes September 2013 October 2015 Core i7 (4-core) iMac (Late 2013) 3.1–4.0 4×256 8 — 4 Yes Yes September 2013 October 2015 MacBook Pro (Late 2013) MacBook Pro (Mid 2014) MacBook Pro (Mid 2015) 2.0–2.8 4×256 6 128 4 Yes Yes October 2013 July 2018 Core i5 (2-core) MacBook Pro (Late 2013 ...
OS X Mavericks was announced on June 10, 2013, at WWDC 2013, and was released on October 22, 2013, worldwide. The update emphasized battery life, Finder improvements, other improvements for power users , and increased iCloud integration, as well as bringing more of Apple's iOS apps to OS X. Mavericks was named after the surfing location in ...
MacBook Air (Early 2015 or later) MacBook Pro (Early 2015 or later) Mac Mini (Late 2014 or later) Mac Pro (Late 2013 or later) Mac Studio (2022) By using patch tools, macOS Monterey can be unofficially installed on earlier computers that are officially unsupported, such as the 2014 iMac and the 2013 MacBook Pro. [30]
Virtual memory combines active RAM and inactive memory on DASD [a] to form a large range of contiguous addresses.. In computing, virtual memory, or virtual storage, [b] is a memory management technique that provides an "idealized abstraction of the storage resources that are actually available on a given machine" [3] which "creates the illusion to users of a very large (main) memory".
Secure virtual memory was an option in earlier releases on Snow Leopard, but the checkbox to disable it was removed later. An anti-malware feature was also added to the system that alerts the user if malware is detected. [62] Mac OS X 10.6.8 added regular malware definition updates. [63]
MacBook Air (Mid 2013 or later) MacBook Pro (Late 2013 or later) Mac Mini (Late 2014 or later) Mac Pro (Late 2013 or later) Developer Transition Kit (only up to Big Sur 11.3 beta 2 [12]) By using patch tools, macOS Big Sur can be installed on earlier computers that are officially unsupported, such as the 2012 iMac and the 2012 MacBook Pro. [13]
By reducing the I/O activity caused by paging requests, virtual memory compression can produce overall performance improvements. The degree of performance improvement depends on a variety of factors, including the availability of any compression co-processors, spare bandwidth on the CPU, speed of the I/O channel, speed of the physical memory, and the compressibility of the physical memory ...