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Memory failure Steady, long beeps Power supply bad No beep Power supply bad, system not plugged in, or power not turned on No beep If everything seems to be functioning correctly there may be a problem with the 'beeper' itself. The system will normally beep one short beep. One long, two short beeps Video card failure
A Linux kernel panic, forced by an attempt to kill init The green screen of death on a TiVo digital video recorder The Mac OS X kernel panic alert. This screen was introduced in Mac OS X 10.2, while the kernel panic itself was around since the Mac OS X Public Beta. The Blue Screen of Death (also called BSoD, or stop error) is a common name for ...
When a Macintosh boots into the classic Mac OS (Mac OS 9 or lower), the system will play its startup chime, and the screen will turn gray. The Happy Mac icon will appear, followed by the "Welcome to Mac OS" splash screen (or the small "Welcome to Macintosh" window in System 7.5 and earlier), which underwent several stylistic changes, the other ...
In computing, an input–output memory management unit (IOMMU) is a memory management unit (MMU) connecting a direct-memory-access–capable (DMA-capable) I/O bus to the main memory. Like a traditional MMU, which translates CPU -visible virtual addresses to physical addresses , the IOMMU maps device-visible virtual addresses (also called device ...
The iMac G4 [a] is an all-in-one personal computer designed, manufactured, and sold by Apple Computer from January 2002 to August 2004. The computer is comprised of a hemispheric base that holds the computer components, including the PowerPC G4 processor, with a flatscreen liquid-crystal display (LCD) mounted above.
Apple says that System Integrity Protection is a necessary step to ensure a high level of security. In one of the WWDC developer sessions, Apple engineer Pierre-Olivier Martel described unrestricted root access as one of the remaining weaknesses of the system, saying that "[any] piece of malware is one password or vulnerability away from taking full control of the device".
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 ...
The mouse supplied was the Apple Mouse known as the Apple Desktop Bus Mouse II (M2706). A slightly updated model, the Color Classic II, featuring the Macintosh LC 550 logic board with a 33 MHz processor, was released in Japan, Canada and some international markets in 1993, sometimes as the Performa 275.