This expectation does not always match reality.
CHECK XCODE VERSION MA UPDATE
That work on your app, use the SDK in the newest Xcode to compile your app, and make changes to yourĪpp to be compatible with any behavior changes whenever you update Xcode. Xcode version when it is released, synchronize these updates across the machines of all developers
CHECK XCODE VERSION MA UPGRADE
Here, “linked on or after macOS 10.13” means “linked against the macOS 10.13 SDK or newer”.Īpple’s expectation is that you upgrade to the new macOS version when it is released, download a new Responsive Scrolling in NSCollectionViews is enabled only for apps linked on or after macOS 10.13. Here’s an example from the 10.13 release notes: In those instances,Īpple often provides the old (compatible) behavior until the app is re-built with the new SDK, expectingĭevelopers to update their apps so that they work with the new behavior, at the same time as Sometimes, these differences in behavior have the potential to break existing apps. MacOS 10.12 and older AppKit release notes These changes are usually described in the AppKit release notes: When a new version of macOS is released, existing APIs can change their behavior. Runtime differences based on macOS SDK version ¶
The third aspect, varying runtime behavior, is perhaps the most insidious and surprising aspect, and is described This information is written down in the SDK’s ist. SDKs have large ranges of supported macOS deployment targets.įor example, the 10.15 SDK supports running your app on macOS versions all the way back to 10.6. The second aspect, available deployment targets, is usually not worth worrying about: (Special case: Calling an unknown Objective-C method usually only emits a warning, not an error.)
CHECK XCODE VERSION MA CODE
If you call an API that’s not declaredĪnywhere - neither in a header file nor in your own code - then your compiler will emit an error. The first is straightforward: An SDK contains header files. Which range of macOS versions your app can run on (available deployment targets), and The SDK used for building an app determines three things: Which APIs you can use if your app is run on a newer version of macOS, assuming you manage to convince the And, conversely, building with a lower macOS SDK doesn’t limit In other words, building with a macOS SDK of a higher version doesn’t magically make new APIs available Of what SDK was used when compiling the app. For example, the AppKit implementation comesįrom /System/Library/Frameworks/amework from the OS that the app is run on, regardless When your app starts up, by the dynamic linker. The implementation of an API is provided by the OS that the app runs on. It does not contain the implementations for these APIs. Inside the app bundle, the SDK is at Xcode.app/Contents/Developer/Platforms/atform/Developer/SDKs/MacOSX.sdk.Īn SDK only contains declarations of APIs. Wait for the 5GB Xcode_*.xip download to finish. Look up the Xcode version number on and click the Download link for it. Have your Apple ID login details ready, and bring enough time and patience for a 5GB download.Ĭheck these tables in the Xcode wikipedia articleĪnd find an Xcode version that contains the SDK you need. The easy but slightly questionable way to obtain an SDK is to download it from a public github repo. Runtime behavior with the SDK used for CI builds.
To check whether your code change breaks building with other SDKs, or to verify the Sometimes you need an SDK that’s different from the one in your Xcode.app, for example Such breakages should be reported in Bugzilla and fixed quickly. This is also the minimum supported SDK version for local builds.Ĭompiling with different SDKs breaks from time to time. Our official Firefox builds compiled in CI (continuous integration) currently use the 13.3 SDK (last updated in bug 1833998). This is called the “minimum deployment target” and is Turning on Firefox tests for a new configurationĪc_add_options -with-macos-sdk=/Users/username/SDKs/MacOSX11.3.sdkįirst off, Firefox runs on 10.15 and above.Overriding SDK-dependent runtime behavior.Runtime differences based on macOS SDK version.Getting Set Up To Work On The Firefox Codebase.
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