MAC RESTART PROBLEM DRIVERS
MAC RESTART PROBLEM SOFTWARE
MAC RESTART PROBLEM MAC
MAC RESTART PROBLEM WINDOWS

Rebooting is a key troubleshooting step because it fixes a huge variety of problems.

MAC RESTART PROBLEM MAC

The Mac cannot be started again until it’s put back into G2, or “soft off.” Macs don’t typically have access to this state directly, but it’s akin to mechanically separating your computer from power by a surge protector switch. Some keyboards also include a power-on button, so that will stay active in this state. Power is cut to everything except devices that listen for power on, like the power button on your Mac.

G2: “Soft off.” This state is the Mac’s off state.

The only difference between this and G2 is the resume process: you won’t need to boot your Mac to return from this power state. If you shut your Mac’s lid and the battery dies, it goes into this state, writing RAM contents to memory if it can.

S4: RAM contents are written to disk and everything powers off.

This is triggered from the Apple menu or happens automatically on a timer after a period of inactivity.

S3: Everything except RAM and peripherals that can wake the computer, like the keyboard, is powered off.

In practice it’s not much more different than the state below, and infrequently used. This preserves the contents of memory while reducing power consumption of the device.

S2: CPU is powered off, wiping the CPU cache.

Peripheral devices, like USB hard drives or web cameras, are powered off.

S1: RAM and CPU power stays on, but the CPU isn’t processing instructions.

G1: Sleeping, which contains several sub-states as listed below.

Every connected component is fully powered up.

G0: Powered on and working this is your Mac’s “awake” and operational status.

There are a couple important power states that help us understand how the computer operates. This controls how power is distributed to different devices, including things like the memory (RAM), storage devices, USB peripherals and more. Power states come in a couple flavors and are controlled by the motherboard or Logic power. These power states comes from ACPI, or Advanced Configuration and Power Interface, which controls power management in your Mac. Much of your Mac’s shutdown and restart processes are controlled by ACPI power states. When you select “shutdown” from the Apple menu, the computer quits all apps, does a little housekeeping, unmounts the filesystem and turns off peripheral devices. The shutdown process is pretty simple itself. All components get reset as part of the shutdown process, so the only difference between shutdown and reboot is that the computer restarts as soon as it can. The computer “knows” to reboot thanks to the ACPI reset command, but that’s only set after the computer has completed the shutdown process. The reboot process is only slightly different from the shutdown process. If the flag isn’t present, the computer moves into the “soft off” state, waiting for you to come back and press the power button again. If the reboot flag is present, the computer starts the boot process as soon as the shutdown process is finished. This reset command is nothing more than a certain value at a certain register address which the motherboard checks before moving to its “off” state. Then, it follow the normal startup (AKA “bootstrap”) process. This flag tells the motherboard, or Logic Board in Apple parlance, to reset the attached components using the correct reset commands.

MAC RESTART PROBLEM SOFTWARE

To know whether you are in the safe mode or not, open System Information and look next to System Software Overview – Boot Mode.In the abstract, a reboot is indicated by a power state flag set by your computer at the end of the shutdown process. To go into Safe Mode, restart your Mac and hold Shift as soon as you hear the startup chime, keep holding the button until the gray progress bar appears under the Apple logo. You can use this mode to narrow down potential cause of software issues and conflicts.

MAC RESTART PROBLEM DRIVERS

Load the Bare Essential with Safe Modeīy booting into Safe Mode, your system will load only the bare minimum drivers and softwares to keep it running. Then use the mouse or arrow keys and Enter to pick one of the drives.Ĥ. To access Startup Manager, restart your Mac and hold down the Option key when you hear the startup chime.

MAC RESTART PROBLEM WINDOWS

It’s useful in several situations, such as your system has multiple drives, and you want to boot into one of them, you want to boot into Windows using Boot Camp, you want to boot from an external drive, or you want to install/reinstall OS X using Installation Disk. Startup Manager is a way to access different drive to boot your system. Use Startup Manager to Choose a Boot Drive

Mac restart problem