macOS
~/Library/Logs/Steinberg/usagelogger

Windows

%AppData%\Local\Steinberg\usagelogger

Cubase article on logging here

macOS

~/Library/Preferences/Ableton/Live x.x.x/Log.txt

~/Library/Application Support/Ableton/Live Reports/

Windows

%AppData%\Roaming\Ableton\Live x.x.x\Preferences\Log.txt

%AppData%\Roaming\Ableton\Live Reports\

Ableton articles on collecting logs here and here

macOS

~/Library/Logs/Avid

Windows

%AppData%\Local\Avid\Logs

Avid article on collecting Pro Tools logs here

macOS

~/Users/username/Library/Logs/Avid/EuCon

Windows

%AppData%\Local\Avid\Logs\EuCon

Avid article on collecting Eucon logs here

macOS System Report

Article on collecting system report here

Windows System Event Logs

1. Click Start, and go to Programs.

2. Go to Administrative Tools, and click Event Viewer.

3. Right-click the appropriate log file (Application, Security, System).

4. Click Save Log File As.

5. Type the name of the file, and click Save.