Including links to official Avid download page and support forums would be helpful, but since I can't include live links, perhaps mention visiting Avid's website.
I need to make sure the information is accurate. Check Avid's support pages for exact system requirements for Pro Tools 12.8.3. For example, Pro Tools 12.8 was released in 2018, and 12.8.3 is a minor update. It requires macOS 10.11 or higher. If the user is on a newer macOS, like 11 or 12, they might not be able to run it unless they can install a lower version or use a virtual machine. That's a common issue with software compatibility. Maybe mention a workaround like using a VM with an older macOS version or running in a Windows partition if they're on a MacBook Pro with Apple Silicon, but that's more advanced.
Troubleshooting section. Common issues could be activation problems, compatibility with newer macOS versions. If the user is on macOS 12 or 13, Pro Tools 12.8.3 might not work. Suggest checking Avid's website for the latest version that supports their OS. If they have an older Mac, maybe it's better to update the OS or find an older version of Pro Tools. Mention error codes, like 14, 26, 34, which are related to activation or hardware issues. Direct them to Avid help resources or community forums.