How to upgrade Bitcoin Core on Mac OS with binaries from tarball?

I want to upgrade to version 0.21.1 from an older version I built from source. However, it is unclear to me how I can upgrade using the .tar.gz file that’s available from the Bitcoin Core website.

I think I found how to do the first step:

tar -xvf bitcoin-0.21.1-osx64.tar.gz

But after that, it’s unclear to me how to proceed. Just trying to learn this stuff – many thanks for your help.