Set the current user accounts profile photo (displayed on the login UI) using a local JPG image.
dscl . delete "${HOME}" JPEGPhoto
dscl . delete "${HOME}" Picture
sudo dscl . create "${HOME}" Picture "${PWD}/avatar.jpg"
Replace Time Machine with Volume on the menu bar
defaults write com.apple.systemuiserver menuExtras -array \
"/System/Library/CoreServices/Menu Extras/AirPort.menu" \
"/System/Library/CoreServices/Menu Extras/Volume.menu" \
"/System/Library/CoreServices/Menu Extras/Battery.menu" \
"/System/Library/CoreServices/Menu Extras/Clock.menu"
Show day of week, date time in 24H time in menu bar e.g. “13 Fri 16:49”
defaults write com.apple.menuextra.clock \
DateFormat -string "d EEE HH:mm"