23 Replies
      Latest reply on May 18, 2017 9:39 AM by mikeywalnuts
      bwildy Level 1 Level 1 (0 points)

        I recently installed the MacOS Sierra beta and have recently noticed that whenever I free up space on my mac, Disk Utility adds the freed space to the purgeable portion rather than the free portion. This has become quite an issue as I now need to partition my drive but disk utility currently shows 146 gb as purgeable and only 36 gb as free. It however claims that 182 gb is available. Is there anyway I can convert this purgeable space to free space?

        • Re: Purgeable Space Problems
          bwildy Level 1 Level 1 (0 points)

          I think I somewhat managed to solve this by creating a smaller partition and then deleting it. I am now able to use the entire purgable space for partitioning.

          • Re: Purgeable Space Problems
            luniacdevel Level 1 Level 1 (20 points)

            I don't think currently there is a way to purge this space manually as of yet. (I asked something similar in https://forums.developer.apple.com/thread/50073 )

              • Re: Purgeable Space Problems
                sap995 Level 1 Level 1 (0 points)

                As a work around for this I did the following to force the space to be cleared.


                In the terminal I used the mkfile command to create a file large enought to completely consume the remaining free space on my drive.


                "mkfile -n 60g ~/Desktop/BIGFILE"


                Replace 60g with whatever file size you would like.


                Once that command was finished I rebooted. I am not sure if this next step is necessary, but I didn't want deleting theses files to just create more purgable space so I used RM in the terminal.


                "sudo RM ~/Desktop/BIGFile"


                By doing this I was able to clear enough space for what I was wanting to do. I have also not noticed any unwanted side affects of this process and I have now done this multiple times for various reasons.

                  • Re: Purgeable Space Problems
                    JulianDik Level 1 Level 1 (0 points)

                    It doesnt work for me, any other solutions found?

                      • Re: Purgeable Space Problems
                        NHUK Level 1 Level 1 (0 points)

                        I finally solved this issue on my macbook air after doing much research online. The descrepancy in my case between the available space reported in finder and the available space in about my mac was due to local snapshots created through the time machine utlity. Although these were seen by about my mac as purgeable, finder was not able to see them in the same way, it seems


                        open terminal and run the command 'df - h'

                        if you see a volume called mobilesync, with a load of used space, thats the culprit.

                        run command 'sudo tmutil disablesync' and enter your password when asked

                        run 'df -h' again and the mobilesync volume should have dissapeared, and your space on your startup disk should be reporting the recovered space

                        run 'sudo tmutil enablesync' to get backup back online and you should be good to go

                        about my mac->storage will have a bit of a funny turn while it sorts itself but will report correclty again in a few minutes - dont panic.


                        Please note, this worked for me, it may not solve your issue

                        Running any terminal commands with elevated permissions (sudo) carries some risk - only follow these instructions if you are comfortable with this.




                        PS let me know if this solves your issues, it would be good to spread the word if this is not just a fix for me.

                        • Re: Purgeable Space Problems
                          jjason Level 1 Level 1 (0 points)

                          I simply opened Time Machine Preferences, clicked the Lock Icon to unlock and make changes. Then I unchecked the box next to Back Up Automatically under the TM Icon. Finally I restarted my Mac. When I turned my Mac back on to check the storage all the purgeable data was gone which freed up over 70 GB on my SSD. Afterwards I went back into the TM preferences and rechecked the Back Up Automatically box. After restarting my computer a second time I saw that the purgeable data was still gone.

                            • Re: Purgeable Space Problems
                              TSLi Level 1 Level 1 (0 points)

                              It works for me, thanks.

                              • Re: Purgeable Space Problems
                                MooInUSA Level 1 Level 1 (0 points)

                                Thanks! This helped me. Much simpler solution than others offered here.

                                • Re: Purgeable Space Problems
                                  SolarCat Level 1 Level 1 (0 points)

                                  Simple, yet genius!  Thanks!

                                  • Re: Purgeable Space Problems
                                    avonsong Level 1 Level 1 (0 points)

                                    Oh wow this worked for me.  Thanks so much.  Have spent hours on the telephone with Apple over this.  The tech support guys don't know this.

                                    • Re: Purgeable Space Problems
                                      pUNKxINxDRublic Level 1 Level 1 (0 points)

                                      Thank you! Such a simple solution!

                                      • Re: Purgeable Space Problems
                                        nat750 Level 1 Level 1 (0 points)

                                        Worked for me, thanks.

                                        • Re: Purgeable Space Problems
                                          ericthefixer Level 1 Level 1 (0 points)

                                          Thank you jjason.  I wish I had found this earlier.   I was on the phone with apple support for 2 hours because I could not back up an iphone to a macbook air computer due to disk space - even though I deleted a ton of stuff and kept deleting more and more.   It eventually became obvious that this was a purgeable space issue since the true free space was not increasing - all deletions were just increasing "purgeable space".  Apple support had no idea how to fix the purgeable space issue.  They had me try a ton of different things - multiple reboots in safe mode, recovery mode, reindexing the disk, etc.    Finally I said  "this is ridiculous, clearly it is a purgeable space issue.  Let me Google 'purgeable space issue' ".  I quickly found this answer about time machine and turned off time machine.    Problem fixed in 5 seconds.  The purgeable disk reallocated itself and the free space increased greatly.  (It remained even after I switched time machine back on).


                                          Why is it that every time I try to back up or restore an iphone via itunes it turns into a multi-hour exercise?   Does apple ever try this stuff with real users?    Why am I finding the solution and telling it to them instead of the other way around?  Do they even review the long phone calls or long genius bar sessions to see what took so long and how to improve those issues?  That is 2+ hours I'll never get back for a badly tested feature - not to mention the loss of a bunch of old iphone backups that I unnnecessarily deleted that I can now never get back if I need them.

                                          • Re: Purgeable Space Problems
                                            jmclagan Level 1 Level 1 (0 points)

                                            Thank you for the TM solution.  After my first reboot, I noticed the purgeable space moved to used space, but after a few minutes it cleared out and left me with 2GB of purgeable and all that wonderful free disk space.

                                            • Re: Purgeable Space Problems
                                              mikeywalnuts Level 1 Level 1 (0 points)

                                              Jjason, they need to put your answer as correct!

                                            • Re: Purgeable Space Problems
                                              Amerbhsase Level 1 Level 1 (0 points)


                                            • Re: Purgeable Space Problems
                                              Voigtsy Level 1 Level 1 (0 points)

                                              Perfect solution. Thank You

                                          • Re: Purgeable Space Problems
                                            gert Level 1 Level 1 (0 points)

                                            A simple way to reclaim the "Purgeable" disk space is to secure erase the disk with the commandline diskutil:


                                                 diskutil secureErase freespace 0 /dev/disk1


                                            Will do so for the startup disk