Hi, So sorry if this has been answered but I'm having a hard time finding this information both on this forum and online. Am wondering if there is a noticeable speed increase in read/write performance when getting the 512 vs 256 model of the new macbook - lets say both are configured with 1.3 processors. Also, any noticeable battery drain in the 1.3 vs 1.2/1.1? I was fortunate enough to finally try out LR CC on the macbook 1.3 ghz today. I found the develop module to be totally usable. Yes there was a little lag when using the "brush" or healing brush tool, but slider adjustments were very usable. I was editing 98 RAW images from my canon 6D. Export time was horrible, but I'm not concerned about that since i am looking for a "commuter" machine. I have a maxed out 15Pro at home. Anyone have any experience with the battery life when using LR? I noticed the CPU was being maxed out at all times when in develop module. Any noticeable diff between 1.1-1.3 in this mode? Trying to get best performance and better life for my needs (making edits, NOT exporting). Thanks for any help. I have read many posts here and haven't found these answers so sorry if its a repeat.