Hi, I am still using Photoshop Elements 9 on my Windows PC and it does what I want without a need to upgrade. Now I just bought a MacBook Air M1 and I want to use PSE9 on it. I do have both original CDs (Win and Mc OS) but I don't have a CD reader on the Mac. I opened the Mac OS disk on my Win PC and copied the files to a Samsung T5 external SSD, then opened those files on my Macbook, but the installer is 'defective', so unusable. Apparently this procedure doesn't work, like I feared. Is there a way or should I simply buy an external DVD/CD reader for the Macbook OR buy PSE2021...?
Since pse9 wil not and will never work on macOS later than Catalina (so also not on big sur) the only option you have is to upgrade to the most recent version. And this version will be obsolete in a few months when the next version is launched. There is no support or updates for a version after the new version is launched, So that makes a maximum support of approximately one year.
If it's only the editor you need, you can also check out affinity. looks very good and now currently with a very nice discount. And with longer support