If you are specifically looking for a version that "works" on Yosemite, you must look for older legacy releases:
Running modern Adobe Photoshop on macOS 10.10 Yosemite is generally not possible as Yosemite is an obsolete operating system that has been unsupported since 2017. Most current versions of Photoshop require at least macOS 11.0 or newer to function. Compatibility and Versions photoshop-for-yosemite-free-download-work
: This is the last version of Creative Cloud officially compatible with macOS 10.10. If you are specifically looking for a version
: Adobe no longer provides direct downloads or technical support for these obsolete versions for most users. : Adobe no longer provides direct downloads or
: These may run but were never fully tested by Adobe for Yosemite; common issues include crashes and the need for Java workarounds. Security and Performance Warnings
: Older Mac hardware capable of running Yosemite (often 2011–2013 models) typically struggles with performance if they have less than 16GB of RAM. Legal and Working Alternatives