xcode-select -p
# select default xcode
sudo xcode-select -s /Applications/Xcode-beta.app/Contents/Developer
# view content
zipinfo file.zip
unzip -l file.zip
zip -e ethereum.zip ethereum_metamask.txt file2.txt # encrypted zip
# delete backup
sudo tmutil delete /Volumes/macbackup/Backups.backupdb/Vu/2018-01-09-104048