[Mac] Musescore 3 beta 3 does not support macOS versions <10.12

• Dec 7, 2018 - 22:57
Reported version
3.0
Type
Functional
Frequency
Once
Severity
S1 - Blocker
Reproducibility
Always
Status
closed
Regression
Yes
Workaround
Yes
Project
MuseScore

#278963: Toggling the workspace results in a crash, #278772: [MacOSX] Crashes randomly when go to do any menu item and #278967: Mac: Factory reset alert when accessing preferences (German localisation) were keeping my from trying the beta. They are meant to be fixed for beta 3 and I would like to have tested that but I am unable to do so as the third beta now fails to launch at all:

dyld: Symbol not found: _kSecAttrKeyTypeECSECPrimeRandom
Referenced from: /Applications/Musescore 3 Beta/MuseScore 3.app/Contents/MacOS/../Frameworks/QtWebEngineCore.framework/Versions/5/QtWebEngineCore (which was built for Mac OS X 10.12)
Expected in: /System/Library/Frameworks/Security.framework/Versions/A/Security
in /Applications/Musescore 3 Beta/MuseScore 3.app/Contents/MacOS/../Frameworks/QtWebEngineCore.framework/Versions/5/QtWebEngineCore

As @dmitrio95 found out, "Qt 5.12 does not support MacOS < 10.12": https://doc-snapshots.qt.io/qt5-5.12/macos.html However, the announcement of the third beta on the blog advertises support for "Mac OS X 10.7 or higher" (https://musescore.org/en/3.0beta2).

Qt probably needs to be downgraded. Is there not an older version of Qt which has the fix for #278772: [MacOSX] Crashes randomly when go to do any menu item?

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