Currently Being ModeratedDec 23, 2011 8:54 PM (in response to daibatsu1)
A G5 iMac doesn't have the needed video-in capability and therefor cannot be used as an external display.
Only 2009 and 2010 27" iMacs and the 2011 ThunderBolt iMacs can be used as external displays.
Currently Being ModeratedOct 24, 2012 8:07 AM (in response to Fortuny)
I understand both computers must have same connections; so either both MiniDisplayport or both Thunderbolt, right?
My imac 2009 has a MiniDisplayport (and no HDMI), but the (new) Mac Mini's have Thunderbolt (with HDMI).
Most search hits conclude theres no way to make these two computers get properly connected.
(unless via LAN or something)
Or is there a solution after all?