![]() However, the system often delays updating the size of the purgeable space by few minutes. When you delete a file or folder and Time Machine is turned on, the system may not delete the files entirely, but move them to the purgeable space, causing it to grow by the corresponding amount. Usually this space is used by the file system itself. Note that some small amount of hidden space (a few GB) may still remain even after scanning as administrator. And in reverse, some other folders will grow in size correspondingly, and restricted files and folders will become visible here and there on your disk. The hidden space should disappear, or become significantly smaller by size. MacOS Mojave or later: Make sure your grant DaisyDisk the full disk access, then relaunch DaisyDisk and rescan your disk. Space missing due to file system errors.File system overhead (2-3 GB is normal for the startup disk).System stuff, like Spotlight index, document versions, etc.Home folders of other users on the same Mac, if any.still hidden - the ultimate remainder of unaccounted space, usually consists of:.This item may include some invisible system volumes and the volumes you created yourself. other volumes (covered in a separate article) - sub-volumes within the same physical disk that share its pool of free space (a new feature of APFS).purgeable space (covered in a separate article) - mostly local snapshots of Time Machine, and also swap files, sleep images and other temporary system files. ![]() The following items typically contribute to the hidden space: When you click on it, you see a further breakdown of the hidden space: DaisyDisk detects the remainder of space and displays a special item hidden space of the corresponding size. This happens because there may be some restricted folders, which DaisyDisk couldn’t scan with default permissions, or which are even entirely unreachable. Sometimes the total size of all scanned files and folders on a disk still don’t make for the entire used space on that disk. I do wish it let you, say, search for all files of a specific type or file extension, and it doesn’t provide a hand-holding approach to thing slike cache management in the same way that a utility like Cocktail does, but it’s still a valuable tool in the arsenal of anybody who’s ever wondered where all of their disk space just went.ĭaisyDisk is just $10 and you can get it either from the developer’s site or from the Mac App Store.User Guide Hidden space What is hidden space ![]() If you’ve ever felt macOS’s built-in storage managment tools leave a bit to be desired, DaisyDisk is a good step-up. (That also makes it easy to go back on your decision before you take an irrevocable action, since you can remove files from the collection point as well.) I generally end up using DaisyDisk as more of a research tool than a file deletion one, since I prefer to be more of micromanager where file management is concerned. You can drag large files to a collection point in the lower left, getting an idea of how much total space you’ll end up freeing up, and then purge them all in one fell swoop. If you want to act on that information, DaisyDisk also makes that easy as well. You can even get down to the file level and use Quick Look to realize, for example, that the biggest single offender is a video that you shot a few years back. You can clik through it to drill down into sub-directories, trying to figure out, for example, which part of your Library folder is eating up the bulk of that 37GB. ![]() After a quick scan of your drives, it provides a circular graph representing your file structure. Not only does it help you figure out where all your disk space is going, but it presents that information in a visual format that makes it easier to see. As internal storage has become harder to upgrade in most of our Macs, keeping an eye on disk space can still be a challenge. But files have gotten commensurately larger as we deal with bigger applications and a truly huge amount of high-quality digital media. These days, we all have hundreds of gigabytes, if not terabytes, of availability. My first Mac came with a 40MB internal hard drive, which meant every kilobyte mattered. Time was, you used to have carefully and vigilantly police what files you stored on your drive. But, on the off chance that you haven’t, allow me to extol its virtues. If you’ve been using a Mac for any length of time, chances are you know-and have probably even used-DaisyDisk.
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