However, if your backup is clean or if you want to return your operating system to an earlier state, a full Time Machine Restoration may be the right option for you. Generally, you should not use local snapshots that might contain the problem you are trying to fix. Time Machine offers another option when you need to recover your entire system. Choose the Reinstall macOS option and follow the instructions. Launch Disk Utility and erase the hard drive, if available Enter your administrator password if necessary To reinstall the operating system from recovery mode, follow the step by step: Important: Before performing any of these actions, you must back up all important data. When reinstalling, you have two options: you can either reinstall over the current operating system or erase the hard drive to start all over again. For example, your Mac might not be booting or you might not have been able to fix a system crash. Some Mac issues require a complete reinstallation of macOS to resolve. If you are unable to regain access to your administrator account, you may need to erase the recovery disk from the Internet or another boot volume. If you forgot your FileVault password, you can use recovery mode to reset it.īased on the method you choose when enabling FileVault, you will be given the option to reset the password using your Apple ID or recovery key. Turn on your Mac and keep pressing the Power button until startup options appear
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