aperture locked up and can't quit
my machine appears to have ground to a near total halt and i can hear the macpro churning. i am trying to close out of aperture by clicking CLOSE from the Dock Icon or QUIT from the pulldown to no avail.
given that I am also closing out other software in an attempt to shut down and restart is there a correct way to shut down aperture and/or things to watch out for in order to protect my database integrity/
TIA