![]() Doing so will likely lead to crashes at runtime if the binary is then deployed to a macOS version lower than what Qt expected to run on.įor more information about SDK-based development on macOS, see Apple's developer documentation. Note: You should not lower the deployment target beyond the default value set by Qt. To raise the deployment target with CMake: You only need to raise the deployment target if your own code uses APIs that were added in a macOS version higher than what Qt defaults to, and you are not using checks to guard their use at runtime. Qt expresses the deployment target via the CMAKE_OSX_DEPLOYMENT_TARGET or QMAKE_MACOSX_DEPLOYMENT_TARGET variables, which by default is set to the minimum supported deployment target for Qt. If the binary is launched on a macOS version below the deployment target macOS or Qt will give an error message and the application will not run. In theory this would allow running your application on every single macOS version released, but for practical (and technical) reasons there is a lower limit to this range, known as the deployment target of your application. When the binary is run on a macOS version lower than the SDK it was built with, Qt will check at runtime whether or not a platform feature is available before utilizing it. 14.sdk Target Platformsīuilding for macOS utilizes a technique called weak linking that allows you to build your application against the headers and libraries of the latest platform SDK, while still allowing your application to be deployed to macOS versions lower than the SDK version. app /Contents /Developer /Platforms /MacOSX. If you need help and support with your Macs, just get in touch with the friendly Moof IT team. If you do have users on an older OS version it is important to ensure that they are on the most recent build version of the older OS, if not, devices could be missing critical security patches.įor a more technical look at build numbers, read one of our older posts about changes to macOS version comparisons in macOS Big Sur. It is always best to have your Macs on the most recent stable OS version. If you found a computer was reporting a version of macOS Catalina 10.15.5 (19F101), this is what it actually means. Most of these aren’t officially released but engineers need to be able to identify them. ![]() Build Version – This is incremented every night.Minor Version – This version tracks with patch releases.Major Version – This changes with every major release that happens within a year.not the current OS) often only build versions are updated with security updates as new features are not released, meaning Apple keep the same major and minor OS versions.Īpple’s build numbers are also categorised in three parts: When Apple release new hardware, there may be a version of an OS that is specific to the new hardware which has a new build number (often referred to as a “forked” version.).Patch VersionĪgain, these updates are Incremental, but occur only when necessary usually when a security patch or urgent fix is required.Īpple’s build versions are critical as they show differences between OS versions, even if the major, minor and patch versions are the same It can appear that Macs are on the most recent minor version of their OS, however, if they are not on the most recent build version critical security patches can be missing. This typically includes new features, but can also include security patches and bug fixes. This is an incremental update that Apple release between 5-6 times a year as required, and it occurs throughout the duration of a major version. ![]() This takes place only once yearly for vital upgrades e.g Catalina, Big Sur, Monterey (Apple unofficially support the current OS and 2 previous versions when releasing security patches.) Minor Version
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