Hello Everyone! Through my extensive searching the MacRumors threads and various google searching I have yet to find a solution to my setup. So here goes... What I would like to do is have my 2 iMacs (both 2013 models, 27" and 21.5") running Lightroom 5 and sharing a single external hard drive. This would allow one iMac to cull/rank photos, and the other iMac to be the main editing station. I'd like to know what the fastest solution would be, either a external thunderbolt hard drive, NAS setup, or something someone might recommend. Kind of in the dark on this type of situation, any help is greatly appreciated! Thanks!!