They're probably in Application Support on my Mac. Oooops, no, not in either my HD Library or my username Library. Hm.
OK, right click on the app gives you package contents. Several profiles folders with sub folders. The icc profiles folder has a couple called large, one medium and several sRGB [sounds familiar]. There are no profiles identifiable as Pro Photo or Adobe RGB in any profile folder or sub folder, but there must be fifty total.
My old Mac is still on System 9.0 and haven't touched it for a while, so I have no idea what you're talking about.
"identifiable" . . Hm . . . er, did your RawTherapee come with a manual by any chance?
Here's what it says:
"RawTherapee comes bundled with a number of custom-made high quality
■ RT_sRGB similar to sRGB with gamma close to sRGB: g=2.40,
■ RT_sRGB_gBT709 similar to sRGB with gamma BT709: g=2.22,
■ RT_sRGB_g10 similar to sRGB with linear gamma g=1.0, slope=0
■ RT_Middle_gsRGB similar to AdobeRGB1998
with gamma close to
sRGB: g=2.40, slope=12.92
■ RT_Large_gsRGB similar to ProPhoto
with gamma close to sRGB
g=2.40, slope=12.92 (close to "Melissa" used by Lightroom)
■ RT_Large_gBT709 similar to ProPhoto
with gamma BT709: g=2.22,
■ RT_Large_g10 similar to ProPhoto
with linear gammma g=1.0,
and here's my folder like yours, which appears to contain all of the above:
good luck . . .