Photoshop 2018 MacOs

My Macbook has become defective. Can no longer work on it. Now I have to fall back on my old Macbook. But this runs only with the operating system 10.11.6. (Can also not upgrade!) All available Phostoshop versions I can get are newer and do not run on it.
Can someone give me a downloadlink for the Photoshop version "Photoshop 2018 MacOs"?
Thanks