- A1173 IMAC OPERATING SYSTEM HOW TO
- A1173 IMAC OPERATING SYSTEM MAC OS X
- A1173 IMAC OPERATING SYSTEM LICENSE
- A1173 IMAC OPERATING SYSTEM BLUETOOTH
A1173 IMAC OPERATING SYSTEM MAC OS X
A1173 IMAC OPERATING SYSTEM HOW TO
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A1173 IMAC OPERATING SYSTEM LICENSE
A1173 IMAC OPERATING SYSTEM BLUETOOTH
Internal components such as Airport or Bluetooth not starting up.Closing/opening laptop lid doesn’t sleep/awaken the computer.
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The following list of situations are some instances where a SMC/PMU reset can be beneficial: For the most part, the power management in the computer should only be reset if you experience problems with seemingly “stuck” settings, or nonfunctional indicators, especially any on the hardware itself (power adapter indicator, or battery life for laptops). However, there are specific behaviors that will benefit from SMC/PMU resets, and others that won’t. Like the PRAM, many people readily offer suggestions for resetting the SMC or the PMU. The System Management Controller (Intel Macs) or Power Management Unit (PowerPC Macs) is a chip that manages the power for various system components such as the fans and backlights, as well as the circuits that initiates power to the whole system when you turn on your computer. NOTE: Resetting the PRAM may require you to set some settings such as mouse speed and keyboard rates again. Allow it to cycle a couple of times and release the keys and allow the computer to boot normally. The computer will chime, and then continually reset and chime while these keys are held. To reset the PRAM, reboot the computer and hold the options-command-P-R keys at the same time. Mouse input rates (click and tracking speeds).Boot volume isn’t set (question mark shows briefly before booting).Time zone information and clock settings.
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There is a small battery on the computer’s mainboard that helps maintain the PRAM settings when power is off. The Parameter RAM is a small amount of “nonvolatile” RAM (NVRAM) that holds various settings that the system can use before the operating system loads, and maintains these settings even when the computer is turned off.