whats the best way to hook my rMBP up to my iMac's 27" monitor

[tfannon]

It just dawned on me that my rMBP is slightly faster, has a bigger SSD, more memory, etc.

I understand their is a way to make the iMac's monitor a slave.

Can this be done with a display port to DVI cable?

Seems like the best way is a straight up thunderbolt connection.

Anyone done this yet?

 

[Thetics]

Can this be done with an older iMac? I have an iMac that has the previous connector, no display port.

 

[Fuzzi]

It's possible but it sucks because the iMac still needs to be running. I sold my iMac, and bought a Thunderbolt Display instead. Works perfectly fine and there is no syncing involved anymore

Google for target display mode

 

[spinstorm]

This is something I considered myself but replacing an iMac with a cinema display will cost you roughly the same amount assuming the iMac is not too old and in good condition but you lose the fact that the iMacs an extra computer.

So your swapping a whole computer for a dumb display for the same price but losing functionality.

It's a real shame that the iMac display won't work without it being powered on.

Of course you could always run the iMac in windows and use it as a display when using the RMBP.