Guitar Rig 5 is officially discontinued. If you already own a license, it should appear in your account within Native Access under the "Legacy Products" or "Not Installed" tabs.
Historically, Guitar Rig 5 was built for older macOS versions. guitar rig 5 download mac
You can sometimes find direct installers for older operating systems on the Native Instruments Support Page . System Requirements for Mac Guitar Rig 5 is officially discontinued
At least 2GB is required, though 4GB+ is recommended for stable performance in a DAW. Compatibility with Modern Macs (M1/M2/M3) guitar rig 5 download mac