First of all, our overlays are not available for macOS right now!
Step 1:
Make sure you are on the latest version.
You can check you're on an outdate version by heading to Settings > All Games > Blitz (Version), and compare that to the latest version available on our download page
If Step 1 doesn't resolve:
If you have and use applications like Rivatuner and/or MSI Afterburner, disable or uninstall them. Unfortunately, these applications can conflict with our overlay.
Step 2:
Ensure you have the overlay enabled. Move to Overlays and enable the respective overlay option.