[RKDinOKC]

Understood when they had a 2GB size limit back when 32bit os only allowed 2GB files. But with 64 bits Macs go to 8 exobytes on both the OS and the disk formating.

Windows Fat32 disk format is where they get the 4GB limit. There is an extendedFAT that goes higher.

Photoshop itself probably has the 32 bit fat32 4GB limit. I run photoshop in 32bit so my extensions/plug-ins still work.

Actually only have one plug-in that requires 32bit. It is from Kodak and does a really good job of resurrecting colors in scans of old faded slides, negatives, and photographs.