first aid high sierra volume could not be unmounted

If you have important files on your drive or partition, recover your data first. A super simple way to do this is by using a data recovery tool like Disk Drill. Even if your operating system can’t read your volume – Disk Drill can.ĭisk Drill is a paid tool – however, you can preview unlimited files for free (even videos). This is important because if you find that even recovery software can’t save your data, your drive might be physically damaged. Any further recovery attempt can worsen the problem and delete your data forever. In this case, you’ll have to send your drive to a professional data recovery center.Download the free Mac version of Disk Drill from the Cleverfiles website and install it.Open Disk Drill and select the problematic USB, SD card, or drive.

On the right sidebar, you can choose what type of scan you want to activate. Let Disk Drill complete its scanning process.Click the “Search for lost data” button.įor this task, we’ll use All recovery methods. You can also use this menu to start going through recovered files by type, and you can even review a lost partition specifically.

For this article, we’ll click the “Review found items” button at the bottom right corner of the window so we can look through all recovered files.

First aid high sierra volume could not be unmounted