To be more specific, I mean the file that keeps a history of every disk image/volume ever mounted. I know it exists because I found it once, but it was a long time ago and I have no idea how to find it again. It is similar to the InstallHistory.plist file, which logs every program ever installed.

1 Answer 1


You can find the information in /var/log/system.log (or using the Console application). But the information is not kept forever.

For example:

Aug  4 07:34:34 ******** kernel[0]: hfs: mounted External on device disk3
Aug  4 07:34:44 ******** kernel[0]: hfs: mounted Time Machine on device disk5

and and a DMG

Aug  5 07:53:25 ******** kernel[0]: hfs: mounted Xcode on device disk6s2

After a while system.log is compressed and archived. To search in all the stored logs

cd /var/log/
(sudo cat system.log; sudo gzcat system.log.*) | grep mounted
  • I feel like it was specifically a list of DMGs that had been mounted, not external volumes.
    – dmbaio
    Aug 4, 2014 at 4:48
  • In my system log I also find external volumes
    – Matteo
    Aug 4, 2014 at 5:54
  • Me too, that's why I don't think that's the list I remember. I remember it showing just the DMG files that had been opened and mounted. Maybe some sort of Disk Image Mounter log or something.
    – dmbaio
    Aug 4, 2014 at 17:32

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .