5 Replies Latest reply: Mar 12, 2012 8:58 PM by rkaufmann87
WillieB Level 1 (15 points)

Our 2007 iMac 2.4G Core2Duo (7,1) doesn't boot into 64-bit mode when holding down the 6 and 4 keys in 10.6.8.


We were wondering if this has changed in Lion, as we're wanting to run Adobe Lightroom 4 which seems to require 64-bit mode.



MacBook Pro, Mac OS X (10.6.8), 15" 2.5GHz C2D 6MB RAM