How can I delete an obsolete Mac OS installer?
I downloaded the Mojave installation app from the app store to create a USB installer drive for a colleague. This worked like a charm with the provided help document (thank you Apple!).
I then moved the now-obsolete 6GB file into the trash. No matter what I do now, the file is undeletable. Not even through the sudo -RM terminal command! What can I do?
Mac mini 2018 or later