hedzerfromson wrote:
When updating to the new MacOS Sequoia 15.3.1 the system reports that the target drive (an external drive) has not enough space and needs 1,23 Gb more, however the drive reports to have 149 Gb available. Also another drive with almost 500Gb available is reported as not enough space.
Removing files from the 1st drive (roughly freeing up 4 Gb the downloaded stops again (later) but complains now that there is even more shortage (2.63 Gb). I already went to an external drive as the internal one complained always when updating the OS (and it is quite small 128 Gb).
I have run firstAid to see if there were any container issues, but no result. Checked if hidden files were the issue, but also a nono.
Is there anyone that can give me advice?
SSD like to have 15-20%+ free storage
see if there is anything here.
Turn off Tme Machine temporarily
Boot into Safeboot mode when you go to run the install
Start up your Mac in safe mode - Apple Support
Review first the following:
Nice list here posted by D.I. Johnson— reducing “System Data”
MacBook Pro System Data file is huge - Apple Community
free vs available disk space huge difference, what is going on?
“The "available" storage is the amount of used storage that the operating system could automatically delete if it felt that it was really necessary. The "free" storage is the amount that you can actually use for something.
There are system processes that run in the background and automatically delete some of the "available" storage and convert it to "free". If you completely run out of storage, then those system processes will try a little harder. When you "delete" files you are just hinting to the operating system that you don't need those files anymore. The operating system will eventually remove them, but on its own schedule.
Certain tools will allow you to force the issue and manually clean up some of this storage and manually delete local snapshots. But that is only temporary. “
ref: Free vs available disk space huge differe… - Apple Community
