Follow these steps to find and view Log Files on a Mac:
Connect your device to a Mac.
Go into File Sharing -> MTGA.
Select to save all the Log files on your phone to the Mac
In order to view the log file on a Windows PC, you will need a 3rd party program that allows you to transfer files from your iOS device to your PC. If you have one installed, take these steps:
- Connect your iOS device to your PC via USB.
- In the file transfer program, go to Apps -> MTG Arena -> Documents -> Logs -> Logs
- Select the log files you want and export them to a folder on your PC.