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Typical POST screen (AMI BIOS) Typical UEFI-compliant BIOS POST screen (Phoenix Technologies BIOS) Summary screen after POST and before booting an operating system (AMI BIOS) A power-on self-test (POST) is a process performed by firmware or software routines immediately after a computer or other digital electronic device is powered on. [1]
macOS High Sierra 10.13.5 Combo Update: 10.13.6 17G65 July 9, 2018 17.7.0 About the macOS High Sierra 10.13.6 Update About the security content of macOS High Sierra 10.13.6: macOS High Sierra 10.13.6 Update macOS High Sierra 10.13.6 Combo Update: 17G2208 July 24, 2018 macOS High Sierra 10.13.6 Supplemental Update for MacBook Pro (2018) 17G2307 ...
The bomb symbol is not used in Mac OS X, but a test application called Bomb.app, specifically written to cause a non-fatal crash, is included with Xcode and uses a rendition of the bomb symbol as its icon. In the original Mac OS, the system call to display a "bomb box" was called DSError, for "Deep Shit". [1]
A new Happy Mac was introduced in Mac OS X 10.1, which looked largely identical to that found in previous Classic Mac OS operating systems with some minor changes. This is also the last version of Mac OS as a whole (both Classic Mac OS and Max OS X) to use the Happy Mac icon. The Mac OS X startup screen from versions 10.2 to 10.9, displaying a ...
The first release of the new OS — Mac OS X Server 1.0 — used a modified version of the Mac OS GUI, but all client versions starting with Mac OS X Developer Preview 3 used a new theme known as Aqua. Aqua was a substantial departure from the Mac OS 9 interface, which had evolved with little change from that of the original Macintosh operating ...
After it is switched on, a computer's central processing unit (CPU) has no software in its main memory, so some process must load software into memory before it can be executed. This may be done by hardware or firmware in the CPU, or by a separate processor in the computer system.
Mac OS X 10.6 Snow Leopard was the first version of Mac OS X to be built exclusively for Intel Macs, and the final release with 32-bit Intel Mac support. [39] The name was intended to signal its status as an iteration of Leopard, focusing on technical and performance improvements rather than user-facing features; indeed it was explicitly ...
If at least one of the processes is a critical kernel process the whole system may hang and have to be restarted. A computer may seem to hang when in fact it is simply processing very slowly. This can be caused by too many programs running at once, not enough memory ( RAM ), or memory fragmentation , slow hardware access (especially to remote ...