For some older Macs this won't necessarily be the latest OS, such as MacOS Monterey, but instead MacOS Catalina, for example. Your computer should then install the latest version of OS that it can install. Re-install MacOSX: click on " Reinstall Mac OS X" > "Continue".Select the Mac OS Extended (Journaled), give a name to your disk and click on Erase.Select the startup disk and go to the Erase Tab.Select " Disk Utility" and click on Continue.Turn your Mac on, while holding the CMD + R keys down.When prompted for a password, enter the password of the authorized account on the drive. Under the File menu, select Unlock Drive Name 5. Catalina high sierra mountain lion operating system. Boot your Mac and hold down -R (Command R) to boot from the Recovery HD partition. If you get a disk locked error on your mac when installing a new OS these are the steps you need to take. Also, it is advised to make a time machine back up of your computer if possible before following the procedure. Here’s how the unlock procedure works for Disk Utility: 1. To reinstall your Mac's OS without an installation disc you need to firstly make sure that you keep your Mac turned on during the whole procedure, and that your Mac is connected to the internet.
#Reinstall imac os disk write locked how to#
In this article we will show you how to reinstall Mac OS without disc. MacOS includes a recovery partition that allows you to easily erase all data on your Mac and reinstall your OS without an installation disc. OS X Mavericks :: Reinstall But The Disc Is Locked I tried repairing permission, and repairing keychain, and repairing disk, but I insert the password.