I can update to iOS 10 betas with OTA Updates, but I want to update using my computer through iTunes because the it is connected via ethernet so download speeds will be faster.
Is there any way to do this?
Edit: I am not a developer.
As far as I could see it is not possible to download public beta's from iOS to your Mac. The only option Apple gives are OTA updates.
You could register as a developer, but the beta's are only available for paying developers.
If you are a developer, you can download beta's from developer.apple.com/download.
I came across this website on reddit. It has downloads for IPSW files for betas and beta profiles.