musescore for mac

Hi! im a user of musescore software. i had it on a pc (windows 7) and there were no main issues!
Then i bought a mac and know im seeing some errors such as i can't delete several compass fast. I have to delete them manually and that takes just so much time, and is annoying! I like to print my scores and i don't want to leave in there blank compass! in windows there was a keyboard shortcut but in mac there isn't! Help!!!