To enable the public developer preview on a desktop or web client:
- Enable custom app uploading or sideloading for your developer tenant. For more information, see Enable custom Teams apps.
- Select the ellipsis (...) menu next to your user profile to display the Teams menu.
- Select About > Developer preview.
- Select Switch to Developer preview. I did a test in my Mac environment and it seems there is no issue. The version is
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