Sooner or later, you will have a full disk with either a very small or nonexistent “Purgeable” section on it. If the system allocates more free space, keep duplicating our dummy file to fill up the disk. Wait a while and see if it has removed parts of the Purgeable section using /Applications/Utilities/Disk Utility. Sooner or later you’re going to hit the magic wall, and you’ll get messages that the disk is full. What we are aiming for, is to fill the disk, so the OS starts purging (hence, eating into the “Purgeable” part.) Now we will make a lot of copies of the file in your home directory. Just keep making several duplicates at the same time to speed things up. So go to your home directory, select the file stupidfile.crap and press cmd-d to duplicate the file. No need to use the /dev/random function to make a larger file, because it’s faster to duplicate the stupidfile.crap we just created. You can now quit the Terminal application. This page is powered by a knowledgeable community that helps you make an informed decision. 'It's beautiful and quick' is the primary reason people pick DaisyDisk over the competition. When the data is about 10-20GB in size, press ctrl-c in the first window to stop creating a file. DaisyDisk, OmniDiskSweeper, and GrandPerspective are probably your best bets out of the 10 options considered. If you do, open a new Terminal window and enter: watch ls -alh ~/stupidfile.crap Another is to install Brew and use it to install the great tool watch by entering the command brew install watch You could do a periodic “Get Info” in the Finder to check on how large the file is. The command creates a file named stupidfile.crap using a device available on Unix/Linux, called /dev/zero which sends zeros which we use to create a large file. Don’t let the sparse interface scare you this thing has superpowers!Įnter the following: dd if=/dev/zero of=~/stupidfile.crap bs=20m Open the Terminal app, found in the Utility folder in Applications. It’s easy enough thanks to MacOS Unix underpinnings. How to remove Purgeable Disk Spaceįirst, I created a 20 GB file using the Terminal application. But after a quick hack, I’ve created an easy way of forcing MacOS to remove the “Purgeable” disk space. After searching the net, I couldn’t find a good solution. But for some reason, MacOS Sierra refused to recognize that I had the free disk space. The issue is, I manually deleted stuff like iMovie and GarageBand with the associated files by hand using OmniDiskSweeper, which is a free and excellent application for finding and removing large unused files on your disk. My problem was that MacOS Sierra refused to remove the Purgeable part of the partition, so when I tried to install Bootcamp, It only showed the “real” free disk space. One “real,” that shows exactly how much there is, and then you have the Purgeable part, that includes software that can be uninstalled on the fly and later restored if enough space is available. If you have it enabled in System Preferences under iCloud/iCloud Drive settings (which I think is on by default), you essentially have two different values of how much disk space you have available. This feature isn’t well-implemented, though. (not actually my disk, forgot to take a screenshot) Optimize Disk StorageĪpple added a feature called “ Optimize Disk Storage” in MacOS Sierra.
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