The Power Management Unit (PMU) is a micro-controller chip, controlling all power functions for the computer. It is a computer within a computer, with it's own memory,...
Apple Administrator
These posts are related to being a/an Apple Administrator
Support two ATA/IDE devices per channel on Power Macintosh G3/G4
According to Apple, some Power Macintosh G3 computers and all Power Mac G4 computers have the ability to support two ATA/IDE devices on the same ATA/IDE channel (commonly...
Macintosh POST Beeps Defined – Part 3
Intel-based Macs such as the iMac, Mac mini, MacBook, MacBook Pro, and Mac Pro rely on a combination of tones and blinking LEDs to display Power On Self Test (POST) error...
Macintosh POST Beeps Defined – Part 2
What do the beeps during the Power-On Self-Test (POST) mean? This test runs whenever the computer is powered on after being fully shut down (the power-on self-test does not...
Macintosh POST Beeps Defined – Part 1
What do the beeps during the Power-On Self-Test (POST) mean? When a fault is detected during the Power-On Self-Test, you will not hear the normal startup chime. Instead, the...
About the Author:
WebDevRobert
Innovative Technology Professional, working on IT/OT Convergence & Security, in the foundry industry.
Website Designer/Developer since the mid 1990’s.
Apple, Linux and Network Administrator since the late 1990’s.
Background includes several years of IT/OT and IIoT Administration, Communications Infrastructure Design and Project Management.
Currently the VP of Technology for Oil City Iron Works, Inc., in Corsicana, TX.