TouchDesigner wants to make changes popup

Absolute beginner here. Installed and when I try to open TouchDesigner a popup comes up saying “TouchDesigner wants to make changes”. Weirdly the username is my full name and not the one I entered. I’ve tried both username and changing password and nothing is working. Any ideas?

On macOS I assume? This is to allow TouchDesigner to install files it needs.
Enter your password for your account on the computer - you can leave the name as-is. The name and password aren’t passed to TouchDesigner, but macOS needs you to authenticate to permit TouchDesigner to continue.

Thanks! All sorted