How to fix "waiting for other installations to complete"
I was trying to install an app (MS Teams) but was seeing a strange message from the installer:
waiting for other installations to complete
I found something on stackoverflow.com on how to fix it and it worked like a charm:
sudo killall -1 installd
Note: I did not run the command to remove any locked files, just filled the process and tried the install again.
Hopefully this helps someone else (or future me).