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We’ll start deprecating the Xamarin Studio stacks in the coming weeks, keeping the Xamarin Studio options for a while but registering new Xamarin projects with the Visual Studio for Mac stack (instead of the Xamarin Studio stack), and eventually move everyone from the Xamarin Studio stacks to the Visual Studio for Mac one. In fact this stack will replace the previous Xamarin Studio stacks eventually.
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The same things described for Xamarin apply for this new Visual Studio for Mac stack.
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Xcode stacks, except the “Edge” one, are built once, and are not updated at all, except with Bitrise CLI related updates, dependency manager cache updates and with critical fixes. You can find the update type of the stacks below. There are stacks where only certain caches are updated (no preinstalled tools etc.), and there are stacks which are completely re-built every week. The stacks on bitrise.io are updated every weekend, but what’s updated depends on the stack. How are the bitrise.io stacks updated and with what frequency? What's the stack deprecation / removal policy? Question & Answer
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