I can't run or create a simulator that isn't iOS26 after downloading the Xcode Beta 3

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Created 6d

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I downloaded the Xcode Beta 3 on my MacBook Pro M4 Base today and tested out some iOS26 mechanics of my app. And when I came back to my main Xcode to continue developing in iOS18, I couldn't build my app. I went to Product > Destination > Manage run destinations and then tried to create a simulator with iOS18 but it didn't show up, only choice that's showing up was iOS26. I tried deleting iOS18 platform and downloading it again but it didn't solve, I tried deleting Xcode Beta but it didn't solve the problem either. I deleted Runtimes folder, it didn't solve too. I can not create a simulator of iOS18 or below too, the error says "The iOS 18.5 simulator runtime is not available. Try reinstalling Xcode or the simulator runtime." How can I fix this problem?

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darkpaw OP

5d

Let's go through this one issue at a time:

"I couldn't build my app": Why not? What error(s) are you seeing? Being unable to build your app has nothing to do with running your app on a Simulator or device (other than it needing to build before you can deploy it).

"tried to create a simulator with iOS18 but it didn't show up": Meaning you don't have iOS 18.5 installed.

"I tried deleting iOS18 platform and downloading it again": Where from? Xcode > Settings > Components? That's the best place to manage your installed runtimes.

"I tried deleting Xcode Beta but it didn't solve the problem": The Xcode and Xcode-beta apps are entirely separate from the installed runtimes. The runtimes are installed in a separate location, which is very flexible because it saves disk space by allowing them to be shared between any installed Xcode apps.

"I deleted Runtimes folder, it didn't solve": Don't do this. Use Xcode's Settings > Components to manage your runtimes.

So, let me know what's listed in your Xcode (not Xcode-beta) app's Settings > Components window. If iOS 18.5 is listed but not installed, try clicking "Get" to install it.

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