Vorta doesn't start on macOS Big Sur after upgrade to 0.10.3 (0.10.2 works)

[sfjes]

Description

After upgrading to Vorta 0.10.3 on macOS Big Sur, Vorta no longer starts.

It looks related to Qt6 build symbols/versions, though I didn't see any mention of Qt6 changes in 0.10.3 specifically. Reverting to Vorta 0.10.2 works.

Initially upgraded via homebrew (which lists support for back to Mojave), then reverted to 0.10.2 via the release binary .dmg. Also confirmed that 0.10.3 via the .dmg has the same issue.

Reproduction

• [x] I tried to reproduce the issue.
• [x] I was able to reproduce the issue.

OS

macOS 11.7.3

Version of Vorta

0.10.3

What did you install Vorta with?

Binary

Version of Borg

No response

Logs

$ /Applications/Vorta.app/Contents/MacOS/vorta-darwin
Traceback (most recent call last):
  File "__main__.py", line 12, in <module>
  File "PyInstaller/loader/pyimod02_importers.py", line 384, in exec_module
  File "store/connection.py", line 11, in <module>
  File "PyInstaller/loader/pyimod02_importers.py", line 384, in exec_module
  File "store/migrations.py", line 6, in <module>
  File "PyInstaller/loader/pyimod02_importers.py", line 384, in exec_module
  File "store/models.py", line 15, in <module>
  File "PyInstaller/loader/pyimod02_importers.py", line 384, in exec_module
  File "utils.py", line 16, in <module>
ImportError: dlopen(/Applications/Vorta.app/Contents/Frameworks/PyQt6/QtCore.abi3.so, 2): Symbol not found: _kIOMainPortDefault
  Referenced from: /Applications/Vorta.app/Contents/Frameworks/PyQt6/../QtCore (which was built for Mac OS X 12.0)
  Expected in: /System/Library/Frameworks/IOKit.framework/Versions/A/IOKit

[PYI-77969:ERROR] Failed to execute script '__main__' due to unhandled exception: dlopen(/Applications/Vorta.app/Contents/Frameworks/PyQt6/QtCore.abi3.so, 2): Symbol not found: _kIOMainPortDefault
  Referenced from: /Applications/Vorta.app/Contents/Frameworks/PyQt6/../QtCore (which was built for Mac OS X 12.0)
  Expected in: /System/Library/Frameworks/IOKit.framework/Versions/A/IOKit

[PYI-77969:ERROR] Traceback:
Traceback (most recent call last):
  File "__main__.py", line 12, in <module>
  File "PyInstaller/loader/pyimod02_importers.py", line 384, in exec_module
  File "store/connection.py", line 11, in <module>
  File "PyInstaller/loader/pyimod02_importers.py", line 384, in exec_module
  File "store/migrations.py", line 6, in <module>
  File "PyInstaller/loader/pyimod02_importers.py", line 384, in exec_module
  File "store/models.py", line 15, in <module>
  File "PyInstaller/loader/pyimod02_importers.py", line 384, in exec_module
  File "utils.py", line 16, in <module>
ImportError: dlopen(/Applications/Vorta.app/Contents/Frameworks/PyQt6/QtCore.abi3.so, 2): Symbol not found: _kIOMainPortDefault
  Referenced from: /Applications/Vorta.app/Contents/Frameworks/PyQt6/../QtCore (which was built for Mac OS X 12.0)
  Expected in: /System/Library/Frameworks/IOKit.framework/Versions/A/IOKit

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