Is it possible to use notarytool in macOS 10.15 Catalina?

Question

I have to use Xcode 12.4 with macOS 10.15 Catalina for a while still for development.

Is it possible to use notarytool instead of altool?

I have copied notarytool from Xcode 13.4 Developer Tools to my usr/local/bin folder. When I run in shell:

xcrun notarytool submit myApp.zip

I get this error:

xcrun: error: unable execute utility "/usr/local/bin/notarytool" because it requires a newer version of macOS.

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Without a solution, I have those 2 options:

As a last resort, I could notarize with the web API:

Submitting software for notarization over the web

Or boot into my macOS 12 Monterey partition each time.

Answer 1

I found an easy solution: You don't have to use xcrun!

With notarytool in usr/local/bin or any executable path, just use it plain like this:

notarytool submit myApp.zip

This avoids the error message and the notarization with notarytool with macOS 10.15 Catalina works fine.