(07-15-2018, 07:19 AM)Monotremata Wrote: I did make sure Im running the latest build, 5.0-8449. Im trying to run it on a 2010 Mac Pro with a Radeon 5770.
Have you tried the 5.0 stable version (available on Dolphin's download site)? You shouldn't see any blue/purple blocks covering your screen with that version. Please note that I have an i5 3570K (overclocked to 4.8 GHz), which is a CPU that's a few years newer than what's in your 2010 Mac Pro. That said, playing through the first stage (at a mere 1x rendering resolution) still had pretty significant stuttering / slowdown for me.
This game requires a LOT of raw CPU power, but I don't necessarily mean lots of cores like an i7 or Threadripper, as Dolphin can really only take advantage of 2 cores, although they recommend a 4 core CPU to handle other background tasks. [Edit: It looks like the Core i7 CPUs still have the best single-core performance when compared to i3s and i5s, so it's probably best to stick with the i7s (or the i9s if you can afford them.)] You'd probably need a 7th or 8th gen Intel CPU (albeit the 9th gen is coming very soon) to get things running relatively smoothly. In my case, I can't really justify spending $1,000+ to upgrade my CPU, RAM, and motherboard just to get these Rogue Squadron games working.
A much cheaper alternative would be to track down a Wii that supports Gamecube games (along with a Gamecube controller) and soft-mod it so that you can play Rebel Strike (among other games) via a USB drive. I had this setup working back in Canada and the experience was sweet, especially when connected via a CRT television. However, I've since moved to Australia and of course their power system is different here, so I had all my classic gaming stuff stored back home until I eventually return.