Note: Avid does not officially support this configuration. Pro Tools 10’s last officially supported OS was Mountain Lion (10.8.5). However, with workarounds, it can run on High Sierra, though not perfectly. This guide is for legacy users who need old RTAS/32-bit plugins or TDM hardware.
| Issue | Solution | |-------|----------| | No audio from Built-in Output | Install Soundflower or use an aggregate device. PT10’s CoreAudio driver conflicts with High Sierra’s. | | Video engine fails to load | Disable video engine in Setup > Preferences. PT10’s video engine is 32-bit and unstable on High Sierra. | | GUI artifacts / flickering | Turn off “Dynamic Transport” and run in Low Resolution mode (Get Info on Pro Tools.app > check “Open in Low Resolution”). | | Can’t save session | Run Disk Utility > First Aid on your drive. APFS volumes sometimes deny PT10 write access. | | iLok not recognized | Uninstall PACE drivers (use their uninstaller), reboot, reinstall v3.0.0. | install pro tools 103 10 on high sierra
Once the session is open, switch the resolution back to your monitor's native setting. ⚙️ Essential Optimizations Note: Avid does not officially support this configuration
The drivers bundled with Pro Tools 10 will almost certainly fail or be blocked by High Sierra’s "System Extension Blocked" security feature. Install any audio interface drivers (check manufacturer for