cs4 creative suite [on macOS Big Sur]

Hi. I bought creative suite - design back in 2008. With it came Adobe Acrobat 9. My old macbook pro still has it and its works. When I bought my new macbook air, i tried to transfer the Acrobat and it doesnt work. It says "The developer of this app needs to update it to work with this version of macOS. Contact the developer for more information." I asked customer service already and they said theres nothing i can download to get Acrobat 9 to work on my new macbook air, but im calling out to everyone here. Maybe someone has some info for me. What can i do. I still have the serial number and all. Please help me!