- #Disc utiltiy mac to fix external hard drive time machine how to#
- #Disc utiltiy mac to fix external hard drive time machine mac os#
If it doesn’t, you’ll need to delete some unneeded files to free up space or start backing up your Mac to a new hard drive. If reformatting your external drive didn’t work, you need to make sure that your external hard drive has enough available space to back up files (go to Disk Utility to check how much free space is left). Check your external hard drive’s free space Now that your external drive is in a compatible format, you should be able to back up to it with Time Machine.
#Disc utiltiy mac to fix external hard drive time machine mac os#
Change the format to Mac OS Extended (Journaled) and click Erase.
#Disc utiltiy mac to fix external hard drive time machine how to#
Here’s how to format your external drive using Disk Utility: In order to work with Time Machine, your external drive needs to be formatted as Mac OS Extended (Journaled) with a GUID Partition Table (GPT). If your external drive is in one of these unsupported formats, you’ll need to reformat it correctly before it’s used to back up your Mac.
So here's a tip for you: Download CleanMyMac to quickly solve some of the issues mentioned in this article.