Keep Me Burning Mac OS

08/17/2015

7

Restoration from a Time Machine backup can be a lifesaver, but restoring the whole system after booting into Internet Restore can cause some serious issues – especially if that restore takes an extended amount of time.

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Normally, the process would be to simply hold down CMD+OPT+R after the BOING and until the spinning globe shows up on the screen, this automatically starts Internet Recovery Mode, and allows you to connect to WiFi or a physical network jack and begin the restore process. You select “Restore from Time Machine Backup,” select the appropriate image, and away you go. When the process is finished, your Mac is back to the way it was before your unfortunate incident, with very few exceptions (if any).

There’s a catch though. Jumping into Internet Recovery Mode also loads the default set of Power Management options, and restoration of a full Mac system these days might take several hours. Those two factors add up to one massive headache. Unless you keep the system awake by tapping a key or moving the mouse now and then, the system will go to sleep in about 10 minutes, and start shutting down spinning disks about 10 minutes later. This means that your – presumably external – Time Machine drive will also get spun down, crashing the restore operation and forcing you to start all over again.

Obviously, it’s just not practical to sit there and keep the system awake for the 6+ hour restore you’re in for if your Time Machine is on a USB 2 disk and is over 500GB or so. There is, however, a way to force the system to never sleep, even in Internet Recovery Mode.

First, boot into Internet Recovery Mode and wait for it to start up. That will bring you to a screen with a window offering you the basic choices of reinstalling OS X, restoring from Time Machine, etc. Go to the menu bar at the top of the screen, and choose Utilities, then Terminal. This closes the first window and brings up a command-line interface (the BASH Terminal) where you can enter these three commands:

pmset -a sleep 0

pmset -a disksleep 0

pmset -a displaysleep 0

Then quit Terminal via the menu, and walk through the standard restoration operation.

Here’s what you’re doing:

pmset is a function of the underlying OS that handles setting parameters for Power Management options. In each case you’re telling OS X to set the named Power Management option (system sleep, disk sleep, display sleep). The “-a” tells OS X to set that option for all power profiles – while you’ll probably only use AC Power during a restore, it’s a good idea to just tell the Mac to use it for all of them. “0” sets the time-out to zero, in other words never sleep.

The result is that the Mac will never dim the display, got to sleep, or stop the spinning disks until you a) re-set those options or b) boot into another OS instance. Since you’re going to boot into a new instance when the restore is done, you don’t have to worry about changing them back later.

Simple as that! Open Terminal, type those three commands, and then quit Terminal and walk through the restore process from your Time Machine backup with no interruptions.

FYI, it's called macOS, not iOS. You say you tried to startup from the Recovery HD but could not. Be sure this is what you did:


Boot from the Recovery HD


  1. Restart the computer.
  2. Immediately after the chime press and hold down the 'COMMAND' and 'R' keys together.
  3. Release the keys when the Utilities Menu appears.


A Troubleshooting Protocol to Identify Problems or Fix macOS El Capitan or Later

You should try each, one at a time, then test to see if the problem is fixed before going on to the next.


Be sure to backup your files before proceeding if possible.


Keep Me Burning Mac OS

Keep Me Burning Mac Os Catalina

  1. Shutdown the computer, wait 30 seconds, restart the computer.
  2. Disconnect all third-party peripherals and remove any support software like drivers and plug-ins.
  3. Start the computer in Safe Mode, then restart normally. This is slower than a standard startup.
  4. Repair the disk by booting from the Recovery HD. Immediately after the chime hold down the Command and R keys until the Utility Menu appears. Choose Disk Utility and click on the Continue button. Select the indented (usually, Macintosh HD) volume entry from the side list. Click on the First Aid button in the toolbar. Wait for the Done button to appear. Quit Disk Utility and return to the Utility Menu. Restart the computer from the Apple Menu.
  5. Create a New User Account Open Users & Groups preferences. Click on the lock icon and enter your Admin password when prompted. On the left under Current User click on the Add [+] button under Login Options. Setup a new Admin user account. Upon completion log out of your current account then log into the new account. If your problems cease, then consider switching to the new account and transferring your files to it - Transferring files from one User Account to another.
  6. Download and install the OS X El Capitan 10.11.6 Combo Update or 10.12.6 Combo Update or Download macOS High Sierra 10.13.3 Combo Update as needed.
  7. Reinstall OS X by booting from the Recovery HD using the Command and R keys. When the Utility Menu appears select Reinstall OS X then click on the Continue button.
  8. Erase and Install OS X Restart the computer. Immediately after the chime hold down the Command and R keys until the Apple logo appears. When the Utility Menu appears:

Keep Me Burning Mac Os 11

  1. Select Disk Utility from the Utility Menu and click on Continue button.
  2. When Disk Utility loads select the drive (out-dented entry) from the Device list.
  3. Click on the Erase icon in Disk Utility's toolbar. A panel will drop down.
  4. Set the Format type to Mac OS Extended (Journaled.)
  5. Click on the Apply button, then wait for the Done button to activate and click on it.
  6. Quit Disk Utility and return to the Utility Menu.
  7. Select Reinstall OS X and click on the Continue button.

Feb 15, 2018 3:16 PM