Hi, I am trying to fix a problem for a friend of mine and would like to get your help with this: system: MacBook Air Late 201, HD 120GB flash drive, OS Yosemite 10.5.5. I used these instructions> https://discussions.apple.com/thread/7194301?start=0&tstart=0 Installed Grand Perspective software, and when I do "SCAN" of the "Macintosh HD" volume, I get this info: 102GB in total: 1) Windows XP.pvm(virtual machine) =30.7GB Iphoto library =27.9GB Photo Library = 3.46GB -----in total: 62.06GB 2) users/Petra/library/mail: 15,18GB users/Petra/library/containers: 1,76GB Music 1.04GB applications: 7GB private var/vm:1GB ------- in total: 25GB 3) Others (Library/fonts..Library/application support....Library/Speech..and many many small items): the rest of the stuff... ----- in total: not sure..to many small files..but probably something like: (102 - 62.06 - 25 - 8= 6GB) 4) free space: 8GB Questions: 1. I cannot actually find a weird file that would take much space. Is here the solution to the "space problem" simply deleting some of her mail+photos? (she needs the virtual machine - Windows XP) 2. how much does the OS X usually take itself? I.e. why does Grandperspective count only from 102GB of total capacity instead of the size of the disk, which is 120GB. What's happened to the 18GB? 3. i've cleaned up trash (also in Mail, Iphotos, Photos..), used CCcleaner for other stuff etc. Is there anything else I am overlooking? 4. She migrated her stuff from Iphotos to Photos..now the issue is she doesn't like Photos..so currently she's having both on it. Can i delete Photos and have her go back to Iphotos only? She's having trouble with the Mac as she's low on hard drive space (and her RAM is only 2GB). I was wondering if there was something else I could do? Please help, thank you Kristina --- Post Merged, Apr 6, 2016 --- Guys, I have used a different software....omnidisksweeper..and this is what i got. these figures are different from the grand perspective software. confused about it...still if anyone has ideas?