Early 2015 Macbook air with a 128 GB hd
I installed Catalina, realized all of my 32 bit applications would not run, so I resorted to my older os(Mojave 10.14.6) from time machine.
I now get notifications that my disk is full and memory is running out. I have 2.83 GB available according to "about this mac"
Is there a Catalina hang-on lurking in my machine?