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Since Safe Sleep also allowed state to be restored in an event of a power outage, unlike other operating systems, hibernate was never offered as an option. In 2005, some Macs running Mac OS X v10.4 began to support Safe Sleep. The feature saves the contents of volatile memory to the system hard disk each time the Mac enters Sleep mode.
macOS Catalina (version 10.15) is the sixteenth major release of macOS, Apple Inc.'s desktop operating system for Macintosh computers. It is the successor to macOS Mojave and was announced at WWDC 2019 on June 3, 2019 and released to the public on October 7, 2019.
Laptops unable to boot (fixed with 12.0.1 update) [21] [22] Inability to charge sleeping laptops with MagSafe (fixed with 12.1 update) [23] Mouse pointer memory leak issue (fixed with 12.1 update) [24] Audio issue with speaker and audio output crackling and popping [25] Problems connecting external displays to Mac using any version of Monterey [26]
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Hibernation (also known as suspend to disk, or Safe Sleep on Macintosh computers [1]) in computing is powering down a computer while retaining its state. When hibernation begins, the computer saves the contents of its random access memory (RAM) to a hard disk or other non-volatile storage .
1. Click the Apple menu, and then click Shut Down.. Note: Wait for 20 seconds, and then turn on the computer. 2. On the keyboard, hold down the Command and Option keys, and then tap the esc key.
About the security content of Security Update 2019-001 High Sierra: Security Update 2019-001 High Sierra: 17G6029: March 25, 2019 17.7.0 About the security content of Security Update 2019-002 High Sierra: Security Update 2019-002 High Sierra: 17G6030 March 29, 2019 17.7.0 xnu-4570.71.35~1: About the security content of Security Update 2019-002 ...
macOS 10.13 High Sierra was released to the public on September 25, 2017. [224] Like OS X El Capitan and OS X Mountain Lion, High Sierra is a refinement-based update having very few new features visible to the user, including updates to Safari, Photos, and Mail, among other changes. [225]