Restore/Recover Mac OS with – “Recovery Mode”
What can I do with recovery mode? What is recovery mode?
- Use backup from “Time Machine” to Restore the Mac
- Use “Disk Utility” from recovery mode to Scan, verify and repair the connected drives
- Re-install stock version of Mac OS or Erase, Install.
- Use Safari to browse the internet or diagnose connection
How to Enter Recovery Mode?
(This only works if your hard drive is not completely damaged, if it is, we need to use internet recovery mode which is the next section)
1 Make sure Mac is powered off.
2 Press the power button then immediately hold the Command ⌘ + R keys till the Apple logo appears. After awhile, the Mac OS utility window should appear, which means we have successfully entered recovery mode.
(If not, we might need to try several times to get the timing right)
How to Exit Recovery Mode?
To Exit the recovery mode, we simply just need to restart the Mac OS. If it keeps getting into recovery mode, just select the normal boot disk, we can try to restart the Mac OS again, now it should boot into normal system as expected.
How to Enter Recovery Mode over Internet connection?
If the hard drive is damaged (You might want to replace the hard drive first in this case) or volume is damaged, we need to Enter recovery mode via internet, here is how.
1 Power off the Mac
2 Press the power button then hold Command ⌘ + Option + R keys after you hear the start-up sound. Release the keys when you see the animated globe on the screen.
3 The loading speed depend on your internet connection speed, it’s a good idea to plug the power cord for your Mac.
4 When the loading is done, we should see the macOS utility window.
5 Now we have successfully entered recovery mode via internet.
How to Enter Recovery Mode with Pre-Made USB/Bootable Installer
Again, if the hard drive is damaged (You might want to replace the hard drive first in this case) or volume is damaged, we need to Enter recovery mode via internet, here is how.
1 If you don’t have an bootable USB yet, follow this guide (https://support.apple.com/en-us/HT201372) to create a bootable USB first (You will need a working Mac for this task)
2 Power off the Mac
3 Press the power button to power on the Mac, when you hear the startup sound, press and hold the Option key. You will see the Startup Manager. Once the Startup Manager screen appears, release the Option key. The utility will look for any available drives that include bootable content including the bootable USB
4 Now select the bootable USB to boot from it, then you should be able to see the disk utility again.
How to Restore from directly connected Time Machine
1 Power off the Mac
2 Connect your Time Machine to the Mac, power on the Mac while holding the Option key
3 Select the Recovery Drive to boot Mac then click on “Use Disk to update the system storage”