I had accumulated up to 300 GB of "other" storage on my internal drive. Thank you for this question and helpful instructions. When you're done with the app, quit it and also quit Terminal. When in doubt, leave it alone or ask for guidance. If something needs to be deleted, make sure you know what it is and how it got there, and then delete it by other, safer, means. I don't recommend that you make a habit of doing this. It may take a few minutes for the app to finish scanning. The application window will open, eventually showing all files in all folders, sorted by size. Ignore any other messages that appear in the Terminal window. If you see a message that your username "is not in the sudoers file," then you're not logged in as an administrator. You may get a one-time warning to be careful. You'll be prompted for your login password, which won't be displayed when you type it. Paste into the Terminal window by pressing command-V. Click Utilities, then Terminal in the icon grid. The application is in the folder that opens. ☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. Select it in the results (it should be at the top.) ![]() ☞ Enter the first few letters of its name into a Spotlight search. Launch the built-in Terminal application in any of the following ways: Sudo /Applications/GrandPerspective.app/Contents/MacOS/GrandPerspective Sudo /Applications/OmniDiskSweeper.app/Contents/MacOS/OmniDiskSweeper Triple-click anywhere in the corresponding line of text below on this page to select it, then copy the selected text to the Clipboard by pressing the key combination command-C: Install the app you downloaded in the Applications folder as usual. The administrator account is the one that was created automatically when you first set up the computer. If you have more than one user account, make sure you're logged in as an administrator. To see everything, you have to run it as root. ODS or GP can't see the whole filesystem when you run it just by double-clicking it only sees files that you have permission to read. Proceed further only if the problem isn't solved by the above steps. Any changes to a photo library must be made from within the application that created it. If you're running an older OS version, use GP.ĭeleting files inside an iPhoto or Aperture library will corrupt the library. Note that ODS only works with OS X 10.8 or later. That means you have multiple backups, not just one. You can also delete files with it, but don't do that unless you're sure that you know what you're deleting and that all data is safely backed up. You can more effectively use a tool such as OmniDiskSweeper (ODS) or GrandPerspective (GP) to explore the volume and find out what's taking up the space. See this support article for some simple ways to free up storage space. If you followed bad advice to disable local snapshots by running a shell command, you may have ended up with a lot of data in the Other category. You ordinarily don't need to, and should not, delete local snapshots yourself. The snapshots are automatically deleted when they expire or when free space falls below a certain level. In the Storage display of System Information, local snapshots are shown as Backups. The space occupied by local snapshots is reported as available by the Finder, and should be considered as such. ![]() When Time Machine backs up a portable Mac, some of the free space will be used to make local snapshots, which are backup copies of recently deleted files. Available storage space that you'll never use is wasted space. ![]() There is little or no performance advantage to having more available space than the minimum Apple recommends. You also need enough space left over to allow for growth of the data. If you use iPhoto, empty its internal Trash first:ĭo the same in other applications, such as Aperture, that have an internal Trash feature.Īccording to Apple documentation, you need at least 9 GB of available space on the startup volume (as shown in the Finder Info window) for normal operation. If the Storage display seems to be inaccurate, try rebuilding the Spotlight index.Įmpty the Trash if you haven't already done so. For information about the Other category in the Storage display, see this support article.
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