I can't install the Roblox Client on my '08 Black MacBook

I was given a Black '08 MacBook, and one of the first things I tried to do was install Roblox. When I tried to install it, it would install the Game Client fine, and the Studio would just be there because I would need MacOS 10.10 to use that. I've tried uninstalling and reinstalling, I've tried restarting my MacBook, I've even tried contacting Roblox Support which was no help whatsoever. I've also looked at the system requirements for the Roblox Game Client, and it says that MacOS 10.7 is still supported to this day, Though there were no RAM requirements. I'd really just like Roblox to be working on my MacBook without any hassle.