Had high hopes that Retroactive might rescue the situation after Apple Music
destroyed 20 years of work on my music library and, shockingly, a Time Machine backup of the library file didn't help.
I still have an old Macbook with an iTunes library as recent as September 2021, so having transferred that to my newer Macbook, I installed Retroactive.
But its iTunes installer thinks I have only 18Gb of the 20Gb of disk space it needs on my startup disk for version 12.9.5 when in fact I have more than 166Gb free. (I know I could install 12.6.5 which requires less space but I don't have a compatible library. It's the library and its structures that I want back. Not just the old iTunes interface, superior though it was.)
Anyone got a clue why Retroactive thinks I have so little free space?