I run all of my photography editing software on a 2011 Mac with 16gb of RAM. I am trying to open large TIFF files of my astro images in PS, but most of the time get a not enough RAM to open notice. I have looked online and don't really see anything that addresses my specific issue. Most say to allocate more ram. I have increased the allocation for PS, but still can't do it. I have a work around importing into LR and then to PS, but it compresses the file from its original format and I loose some of the data. The files I am using come straight from Deep Sky Stacker and are exported as a TIFF. They are 32bit TIFF.

Does anyone have any idea how to open the original files as they are from DSS?