Using an iMac as an external screen for a MacBook Pro
Is it possible to use an iMac (iMac7,1, 20-inch, mid 2007) as a larger screen for a MacBook Pro (MacBookPro6,2, 15-inch, Mid 2010)?
I want to be able to use the 15" Macbook Pro but view the output on the iMac's 20" display.
I've looked at Target Display Mode but don't think it's compatible with the iMac.