Bitcoin Forum

Please help. I am trying to run the latest version of Bitcoin Core on my mid-2009 Macbook Pro. Currently running OS X Capitan 10.11.6 which is the latest and greatest update. When running Bitcoin Core version 0.21.0, it gives me an error message "You can't use this version of the application "Bitcoin-Qt" with this version of OS X. You have OS X 10.11.6. The application requires OS X 10.12 or later".

Maybe there is an older version of Bitcoin Core I could download that would be compatible?

Any advise is very much appreciated.

Using an older version of the bitcoin core isn't an option, for something we have the updates, most of them are to fix security issues.

I have an old mac too and to avoid this kind of problem I installed the last ubuntu on it, this solution is nice because you can run all the updated and new software on that old lap.

Yeah, not looking to have to mess with ubintu. Alternatively, I have downloaded Bitcoin Core on my new Mac but receiving the error message "Bitcoin Core can't be opened because Apple cannot check it for malicious software. This software needs to be updated. Contact the developer for more information."

Not sure why this error occurs with the latest software.

You can try one thing, get the source code from the official repository of bitcoin core and install all it's dependencies.
Once the whole setup is done, compile it from scratch and then use the CLI or GUI based on your preference.
Process is a little lengthy but you will learn a lot of things in the process.

Official repo : https://github.com/bitcoin/bitcoin/