chillyer wrote:
I was trying to update to Ventura 13.6.3. It gave me an error message and didn't complete the install. Now nothing seems to work properly.
Try booting into Safe Mode to see if it will allow you to complete the installation. If Safe Mode works, then it most likely means you have some third party software installed which is interfering with the normal operation of macOS. Usual culprits are anti-virus apps, cleaning/optimizer apps, and third party security software.....none of which are needed on a Mac.
Get Info on my Mac HD shows that 960GB are used but I don't see how that is correct. It also shows that 403GB are available and 348GB are purgeable.
Also what does the "348GB of purgeable data" mean?
Good observation of the "Purgeable" value. Very few people seem to pick up on that and question it.
Purgeable storage is the storage that will be released for use at some unknown point in the future.
Available storage is a combination of Purgeable storage and Free space. Free space is storage that can be utilized immediately. Free space is the most important storage value. It is unfortunate Apple only mentions Free space in the Storage section of the System Profiler and within Disk Utility. Everywhere else macOS only reports Available storage which is very misleading, although you can calculate the Free space using the information provided.
Free space = Available - Purgeable
Available storage = Purgeable + Free
Can I delete this somehow? I have already emptied the Trash.
Storage with APFS volumes is complicated. Many times you will find storage space taken up by the hidden APFS snapshots which are usually backup snapshots from Time Machine or from third party backup software. Usually these snapshots will be automatically deleted after a day to a week, but sometimes some snapshot may be retained for longer. Sometimes this can be configured through the backup software.
You can use the instructions in the following Apple article to view & delete APFS snapshots (make sure to click on the Data volume on the left pane of Disk Utility so that the "Show APFS snapshots" option appears on the Disk Utility "View" menu on the menu bar):
View APFS snapshots in Disk Utility on Mac - Apple Support
Storage info under the General System Settings shows that there are 360GB of data free.
The storage management area is known to be incorrect especially for various categories.
