Dual Display Help

gelie

macrumors 6502
Original poster
Mar 7, 2010
469
176
Hello I'm thinking of buying a 27' retina iMac. I would like to use my existing 21.5 mid 2010 iMac as a dual display. can this bee done? What cable would i need to do this? Also should I transfer my existing data to the new iMac first?
 

andy9l

macrumors 68000
Aug 31, 2009
1,698
362
England, UK
Dual Display Help

The 2010 21.5 inch iMacs cannot be used as external displays.

A simple way to migrate your data would be to backup your existing iMac to an external hard drive using Time Machine. Then, use migration assistant to restore your data during the setup process of the new retina iMac.
 

gelie

macrumors 6502
Original poster
Mar 7, 2010
469
176
Thanks. I thought I heard there might be some software that might allow me to utilize my second IMac?
 

andy9l

macrumors 68000
Aug 31, 2009
1,698
362
England, UK
Dual Display Help

Sorry, edited my post to be more specific. The 2010 21.5" does not support Target Display Mode.

Unless I'm mistaken, your Mini DisplayPort is one-way - and that's out, not in. That's a hardware limitation, and not something software could solve.