First try booting holding Command-R. If there is a functioning recovery partition, it will boot into it.
If it is not there, then re-install your version of Mac OS X over top of your current version. Assuming you downloaded your current version, you can use Applications -> App Store -> Purchases tab to download it again, and then allow it to reinstall over top of the existing version. That process should recreate the recovery partition.
First try booting holding Command-R. If there is a functioning recovery partition, it will boot into it.
If it is not there, then re-install your version of Mac OS X over top of your current version. Assuming you downloaded your current version, you can use Applications -> App Store -> Purchases tab to download it again, and then allow it to reinstall over top of the existing version. That process should recreate the recovery partition.
Did you get into Recovery Mode?
If you DID NOT get into Recovery mode, then try Command-Option-R for "Internet Recover" where the Mac gets the recovery mode code from apple.com/support over the network, and does not depend on your having a working recovery partition (Assumes you have a Mac that was manufactured in 2011 or newer)
Command-Opiton-R is part of the firmware built into the hardware. If you do not have Command-Option-R, then your Mac must be rather old (like something before 2011).
At this point, it might be easier to make a Genius Bar appointment at your local Apple store and ask them for assistance.
Other possibilities. Use another Mac (or a friends). In the App Store sign-in to your Apple ID. Download a version of macOS that is in your App Store -> Purchases tab. When it launches after download, "Quit". Now use DiskMakerX to create a bootable USB drive (external USB disk, USB Thumb drive, etc...). Now use the bootable USB drive to install macOS on your Mac
If you used a friends system, remember to sign-out of your Apple ID in the App Store 🙂
Dear Bob thank u 4 your guidance . Commond + R didn't work. I think I can't get last version of mac os for unclear period of time.
Yes I did, but I couldn't get recovery hd again not by "command + R" nor by "command + option + R"! Both do the same thing. I think it is because of that I hadn't define restore point.
I'll try it. Thank u dear Bob☺.
How can i get recovery HD again?
