MacBook Pro can't update OS due to lack of free space
When attempting update of the OS, I get a message there is not enough free disk space. There is over 20GB of 'purgeable' data. The documentation for Disk Utility and SUPPORT comments I find state that the upgrade will automatically delete the 'purgeable' files in order to complete update install.
This is not working.. and the info about 'purgeable' has been 'purged' from the DiskUtility help.