I downloaded the MacOS Big Sur Beta 3. After downloading it, I attempted to install it. The installer popped up, I went through the prompts, and my Mac then restarted and went through the installation process with the black screen and the Apple logo. This took about 30 minutes. However, once my Mac booted up after the installation process, I realized that it was still on beta 2. Because of this, I went through the installation process once again, but it is still stuck on beta 2, even though it went through the installation process twice without any error messages. I'm not sure what to do to make it successfully install beta 3. Any thoughts? Thank you!