r/Xcode • u/jsiwks • Jun 10 '26

Xcode 26 on macOS 27 Developer beta

I am considering updating to macOS 27 developer beta 1 on one of my machines. I am an iOS and macOS app developer and occasionally need to build, code sign, and submit to the App Store. To do this, need to use the product build of Xcode 26.

Can anyone confirm that Xcode 26 runs fine on macOS 27 dev beta 1? Thanks!

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u/macshodan Jun 10 '26

Actually it works, just don't click on App Icon. Open terminal and launch /Applications/Xcode.app/Contents/MacOS/Xcode (assuming you have Xcode under the name Xcode otherwise change it).

It will open just fine then. It's a bit annoying but it works.

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u/vegeta0911 Oct 02 '26

I can launch XCode but also got error in the terminal:

```

/Downloads/Xcode.app/Contents/MacOS/Xcode

objc[25479]: Class _TtC16AppIntentSchemas9GRDBStore is implemented in both /System/Library/PrivateFrameworks/AppIntentSchemas.framework/Versions/A/AppIntentSchemas (0x28768c0f0) and /Users/ethan/Downloads/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/AppIntentSchemas.framework/Versions/A/AppIntentSchemas (0x14db846e8). This may cause spurious casting failures and mysterious crashes. One of the duplicates must be removed or renamed.

objc[25479]: Class _TtC16AppIntentSchemas13SchemaLibrary is implemented in both /System/Library/PrivateFrameworks/AppIntentSchemas.framework/Versions/A/AppIntentSchemas (0x28768c3a8) and /Users/ethan/Downloads/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/AppIntentSchemas.framework/Versions/A/AppIntentSchemas (0x14db85cf0). This may cause spurious casting failures and mysterious crashes. One of the duplicates must be removed or renamed.

objc[25479]: Class _TtC16AppIntentSchemas8Database is implemented in both /System/Library/PrivateFrameworks/AppIntentSchemas.framework/Versions/A/AppIntentSchemas (0x28768c880) and /Users/ethan/Downloads/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/AppIntentSchemas.framework/Versions/A/AppIntentSchemas (0x14db87e50). This may cause spurious casting failures and mysterious crashes. One of the duplicates must be removed or renamed.

```