I have an external SSD where I want to install Big Sur beta. It would not install because it wanted an extra 20GB space. I have now deleted 50GB and emptied the trash, but the deleted space is showing as purgeable, and the installer still does not see the space as available.
Yes, I could erase the disk. But I don’t want to because I’d rather experience Big Sur with the data that is on the disk.
How can I reclaim this purgeable space on an external SSD?
Answered my own question, leaving it here in case others need it later: DaisyDisk, but not the Mac App Store version. Since I have the MAS version, I downloaded the free trial version and that did it. Thankyou DaisyDisk!
It’s understandable. Apple would not allow it on the App Store if it did something that Apple would not allow. iStat Menus has similar issues which they get around by providing a free download that provides the forbidden functions if you buy the App Store version.
I’m not sure that Full Disk Access would allow low level access like purging space and whatever it is that iStat Menus can’t do from the MAS version (read temperature sensors? set fan speed based on temperature? can’t remember).
sometimes ago there was a procedure (in app) to get the standalone versione from the App Store version, to let it run wit less constraint… it might be worth checking
Back reading my own post. I’m trying to increase the free space on my 1TB internal SSD. I have deleted 100GB of files, some regular files and a device backup, every time I have emptied trash and every time DaisyDisk reports increased hidden space and I don’t get a byte of free space back.