@georgia I know that feeling from the first time I wanted to use MX Linux as it came configured with XFCE. I think it took me only 2 or 3 days to find it not only usable, but found some advantages that having the bar at the bottom doesn't give you -of the top of my head, notifications and mini widgets are easier to notices.
Now I want to setup the bar vertically myself haha; I remembered another advantage were that you had 100% of the entire vertical area of the monitor, while always having the bar on the side all the time (as obvious as it sound I wanted to make it clear).
Finally, you can give MX Linux a try, I don't know if it will work on your Mac so check before on the forum, but it's based on the fusion of 2 distros (MEPIS and Antix) who wanted to make a stabler-than how stable it's Debian. They also introduced many useful tools like USB making, Kernel setup, their own GUI for package system... and it comes with XFCE vertically aligned as I was saying - I got used thanks to that super ultra stable distro.