Currently using Yosemite on a mac mini 10.10.5 and wondering if I can still use CS4 with El Capitan (or later?). Been having lots of strange things happening with current OS; can't validate certificates; flash player download scam are the current the biggies. Won't accept my password for iCloud popup that happens every time I turn it on. That's annoying.
At one time I was even able to use Photoshop CS3 with Yosemite. Can't remember exactly how I lost it. Being an old guy may have had something to do with it. When I went to the Adobe site for their alternate serial number they no longer had it available.
Repaired permissions and validated disk doesn't seem to change anything.
Thanks. Sorry if this is not posted in the correct place.