Home Forums Mac Software Mac Operating Systems Time Machine Recognize An External Startup Drive?

I get

$ bless --info --getboot
Boot option does not match XML representation
XML representation doesn't match true boot preference

on a late 2012 mini running 10.9.2.

Interestingly, going into System Preferences -> Startup Disk, no volume appears to be selected. Choosing the internal drive, exiting the prefpane, and running the command again gives the expected result:

$ bless --info --getboot
/dev/disk0s2