opening a painter file with .psd in the latest version of photoshop

I have corel painter 2015. I have recently saved some work in the psd format to use in the latest version of adobe photoshop.  The file will not open in this version of photoshop.  Do I have to upgrade? I am not sure if my computer can run painter 2021 or 2020 smoothly. I have 2012 mac pro. Could I go buy painter 2017? Sometimes I want to use my painter images in photoshop or illustrator.