Updates and my older Photoshop?

[terryallen]

My Mac is a 10.13.6.
I recently purchased a (new to me, but used) iPhone XS Max.
In trying to hook up and download photos to my Mac, I get a message that I cannot do so, saying that I need to update the software on my Mac to be able to use my (new/used) phone with the Mac.
The potential problem, is that I have Photoshop CSS extended Version 12.1 x64… And I was told that if I update any further then what it is now, that I may have issues using my Photoshop… or that it may not work at all...which will be a HUGE problem.
Am REALLY hoping someone may know for sure, and if so, what if anything I can do...work arounds, etc. (I cannot afford any monthly Photoshop charges, and currently, my Version 12.1 (CSS Extended), works fine.
Thank you SOO MUCH

 

[Bayer]

I'm guessing you'd have to check whether the Photoshop CSS version you have (is your Photoshop a 32-bit or 64-bit version?) will be compatible with the eventual updated iMac version, or simply change to a non-Adobe product. I find Adobe products are excessively priced. Have you tried using Gimp (free) instead? It takes some getting used to, but does a decent job.