I'm looking at an iMac running OS X 10.5.8 and it has an annoying problem.
It has an external USB disk for Time Machine and it will normally shutdown okay.
However if the machine has been asleep and then woken up and then a shutdown attempted it seems that the USB disk won't respond to a request to eject and therefore shutdown hangs (powering the disk off will release the shutdown)
Any thoughts on why this might be, and where to start fixing it most welcome.
The obvious, but tedious fix is to eject the disk manually prior to shutdown, but I'm looking for automatic.