Install Pro Tools 103 10 On High Sierra -

Steps to install Pro Tools 10.3.3 on macOS High Sierra (10.13)

Notes/assumptions: you mean Pro Tools 10.3.3 (Pro Tools 10.x) and macOS High Sierra (10.13). Pro Tools 10 is old and not officially supported on High Sierra; these steps aim to maximize compatibility but may still fail.

• /Library/Audio/Plug-Ins/HAL/ – delete DigiDioMgr.kext and Pro Tools-related .plugins.
• /System/Library/Extensions/ – delete any DigiDal.kext or DigiIO.kext (back them up first).

1. Disable Wi-Fi and Ethernet (unplug the cable or turn off AirPort).
2. Open System Preferences > Date & Time. Unlock the padlock, then uncheck “Set date and time automatically.”
3. Manually set the date to January 1, 2015.
4. Close System Preferences.

Save, then sign the modified package:

Downgrade macOS: For a stable Pro Tools 10 experience, consider downgrading your system to macOS 10.8.5 or 10.9 (Mavericks), which are widely considered the most stable hosts for this version. install pro tools 103 10 on high sierra

You will see multiple .pkg files. You must install them in this specific order: Steps to install Pro Tools 10

Step 1: Prepare the System

High Sierra introduces new security features that block legacy kernel extensions (kexts). You must prepare the OS to accept the old Avid drivers. /Library/Audio/Plug-Ins/HAL/ – delete DigiDioMgr