For this we use the Activity Monitor app. Once we know what process is preventing us from ejecting our disk, we can force it to stop. Why does Quicklook preventing me from ejecting my disk? I suspect that this is just a bug. Go to Spotlight Search, type in Disk Utility, and click the first option. If I preview any other file like PDF or JPG the disk can be ejected normally. Some external hard drives need to be plugged into an outlet to work. I noticed that when I use the Quicklook feature to preview a video in any format, the process keeps active even when the Quicklook window was already closed. The QuickLook process is a feature that was introduced in the Mac OS X 10.5 Leopard. Note! In some cases, macOS will allow us to “force-eject” the disk, but we may still lose data, so force eject is not reasonable.Īfter some investigation I found that in my case this is the QuickLook process.
Now I need to know what app is using my disk so I can properly quit that app and eject my disk. As far as I’m aware, I’m not using the disk but Finder says I do, so I must be wrong. If this happens, we just need to close the file in question and try again eject the disk. If we have any file stored on the disk open in any app, macOS may prevent us from ejecting the disk so we don’t lose any of our data. It means that we are trying to eject the disk that is currently in use. But to my surprise when pressing the ‘eject’ button Finder warns me with the following error message:įor more experienced users, I recommend reading another article about this issue.
After working with an external hard drive (further simply - disk) I want to cleanly unmount it.
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