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I have installed tezos-client on MacOS via Home Brew. After Ithaca upgrade I am getting the following error message:
Fatal error: unknown protocol version.
I tried upgrading tezos-client by: 1)brew tap serokell/tezos-packaging https://github.com/serokell/tezos-packaging.git 2)brew tap serokell/tezos-packaging-stable https://github.com/serokell/tezos-packaging-stable.git
Without success. Any idea what else I can try?
It sounds like you are using an old version of tezos-client, you need at least v12.0 for Ithaca support.
You can check what version you are running by executing tezos-client --version, with the latest release (at the time of writing) it should show:
61fed540 (2022-03-31 10:53:22 +0200) (12.2)
Both tezos-packaging and tezos-packaging-stable are updated to the latest available Octez version (v12.2, as you can see above) and brew tap should be able to find that.
If you still have trouble I recommend checking brew's documentation or opening a new issue in tezos-packaging.
brew tap already, so you should be able to update. I believe that the commands to run should be: brew update followed by another brew install tezos-client
stable one) and removing the cutting-edge one with brew untap serokell/tezos-packaging