Boot your system to macOS Recovery Mode, as explained earlier.Connect Time Machine backup drive to your Mac.Restoring macOS Catalina startup disk from Time Machine backup drive is simple and is performed in a fashion similar to earlier macOS. Restore macOS Catalina Startup Disk from Backup Once the disk is selected, let Time Machine app initiates and completes its first backup on macOS Catalina. Select the new or old Time Machine backup drive from the available options. Specify the device to be used for Time Machine backup on macOS Catalina.
Then, go to System Preferences and launch Time Machine. All you have to do is plug-in an external storage drive of a size larger than your startup disk. Thankfully, you can create Time Machine backup on macOS Catalina 10.15. Your data is at risk if you don't have its backup. The process of disk repair on Mojave and later macOS is done similarly.
Delete the corrupt file, if you can replace or recreate it. When Disk Utility says overlapped extent allocation error, then check DamagedFiles folder at the top level of the disk.When Disk Utility reports, First Aid process failed, then run First Aid once again.When Disk Utility tells the disk has been repaired, or disk appears to be OK, your macOS startup disk repair process is over.Click Continue again to initiate the repair process. So, back up Macintosh HD to another storage drive. If Disk Utility reports the startup disk is about to fail, then you can’t repair the disk.In the sidebar of Disk Utility, select startup disk ( Macintosh HD) that contains macOS Catalina 10.15.Release the keys once you see the Apple logo. Restart Mac & press- Command + R keys together.If your MacBook is running slow after Catalina 10.15 upgrade or your iMac is crashing, then don't hesitate to fix your Mac’s in-built storage drive (SSD or HDD).ĭisk Utility Repair Video Tutorial and Steps are as follows:
Doing so is easy since Disk Utility is the best free tool available on macOS to repair a drive. Repair macOS Catalina Startup DiskĪt some point in time, you might require to fix macOS Catalina startup disk. In such a case, opt for repairing startup disk to retrieve the lost data. For instance- backing up startup disk on macOS Catalina to prevent loss of data in case of potential failure of the storage drive. But, you should follow a few essential steps after macOS upgrade to ensure smooth functioning of your Mac. As a Mac user, you rejoice every time Apple rolls out a new macOS.
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