{"id":6099,"library":"pyobjc-framework-diskarbitration","title":"PyObjC Framework: DiskArbitration","description":"This library provides Python wrappers for Apple's DiskArbitration framework on macOS, enabling programmatic interaction with disk management, mount/unmount events, and disk information. It is part of the larger PyObjC project, currently at version 12.1, with a release cadence often synchronized with macOS SDK updates and Python version support.","status":"active","version":"12.1","language":"en","source_language":"en","source_url":"https://github.com/ronaldoussoren/pyobjc","tags":["macos","objective-c","disk management","framework","pyobjc","system utilities"],"install":[{"cmd":"pip install pyobjc-framework-diskarbitration","lang":"bash","label":"Install specific framework"},{"cmd":"pip install pyobjc","lang":"bash","label":"Install all PyObjC frameworks (recommended)"}],"dependencies":[{"reason":"Core bridge functionality for Objective-C and Python interaction.","package":"pyobjc-core","optional":false}],"imports":[{"symbol":"DiskArbitration","correct":"import DiskArbitration"}],"quickstart":{"code":"import DiskArbitration\nimport CoreFoundation\n\n# Create a DiskArbitration session\nsession = DiskArbitration.DASessionCreate(CoreFoundation.kCFAllocatorDefault)\n\nif session:\n    print(\"DiskArbitration session created successfully.\")\n    # In a real application, you would register callbacks, e.g., using DASessionScheduleWithRunLoop\n    # For a quick demo, we just verify session creation and release it.\n    CoreFoundation.CFRelease(session)\nelse:\n    print(\"Failed to create DiskArbitration session.\")\n","lang":"python","description":"This quickstart demonstrates how to import the DiskArbitration framework and create a basic session. It verifies that the framework is correctly loaded and accessible, releasing the session immediately as a full-fledged DiskArbitration application typically involves event loops and callbacks."},"warnings":[{"fix":"Upgrade Python to 3.10 or later, or pin pyobjc-framework-diskarbitration to a compatible version (e.g., `<12.0` for Python 3.9 users, `<11.0` for Python 3.8 users).","message":"PyObjC 12.0 dropped support for Python 3.9, and PyObjC 11.0 dropped support for Python 3.8. Users on these older Python versions must use an earlier PyObjC version.","severity":"breaking","affected_versions":">=12.0 (Python 3.9), >=11.0 (Python 3.8)"},{"fix":"Carefully review custom `__new__` and `__init__` implementations in Python subclasses of Objective-C objects, especially those involving memory management, to ensure they comply with the new ARC semantics.","message":"PyObjC 11.1 introduced significant changes in how initializer methods (`init` family) are handled for Automatic Reference Counting (ARC), aligning with clang's documentation. This can alter reference counting behavior for custom Objective-C classes or Python subclasses.","severity":"breaking","affected_versions":">=11.1"},{"fix":"For subclasses implementing `__new__`, ensure `__init__` is called correctly. If encountering issues, test on 10.3.1 or later. Avoid directly calling `super().__init__` on `objc.objc_object` when using PyObjC's provided `__new__`.","message":"The interaction between Objective-C object initialization (`alloc`/`init`) and Python's `__new__`/`__init__` can be complex. PyObjC 10.3 temporarily broke the ability to call `__init__` after `__new__` for some cases, which was partially reverted in 10.3.1. Code relying on custom `__new__` might behave unexpectedly.","severity":"gotcha","affected_versions":"10.3, 10.3.1"},{"fix":"If working with Python 3.13 or newer, be aware that free-threading support in PyObjC is still experimental. Avoid using PyObjC in a free-threaded context unless absolutely necessary and with thorough testing, or wait for a stable release with full free-threading guarantees.","message":"While Python 3.13 introduces experimental free-threading (PEP 703), PyObjC 10.3 explicitly stated it did not support it. PyObjC 11.0 added *experimental* free-threading support. Using PyObjC in a free-threaded environment before full, stable support could lead to instability or incorrect behavior.","severity":"gotcha","affected_versions":">=10.3, <12.0 (with Python 3.13+)"}],"env_vars":null,"last_verified":"2026-04-14T00:00:00.000Z","next_check":"2026-07-13T00:00:00.000Z"}