Author ronaldoussoren
Recipients bergkvist, ned.deily, ronaldoussoren
Date 2021-07-21.07:07:25
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Message-id <1626851245.54.0.172211119118.issue44689@roundup.psfhosted.org>
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The problem with moving from Catalina to Big Sur is a known issue, AFAIK there's an open issue for this.

The problem is that Big Sur moved system libraries into a big blob (which Apple calls the shared library cache). Ctypes uses an API that's new in macOS 11 to check if a library is in that cache, but only when compiled with the the macOS 11 SDK or later as the API is not available in earlier SDKs.

Moving from Big Sur to earlier version should work fine, but only if you set the deployment target correctly during the build. This is how the "universal2" installers on python.org are build.
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Date User Action Args
2021-07-21 07:07:25ronaldoussorensetrecipients: + ronaldoussoren, ned.deily, bergkvist
2021-07-21 07:07:25ronaldoussorensetmessageid: <1626851245.54.0.172211119118.issue44689@roundup.psfhosted.org>
2021-07-21 07:07:25ronaldoussorenlinkissue44689 messages
2021-07-21 07:07:25ronaldoussorencreate