macOS Xcode problem

[superscape]

Hi,

I've suddenly started having a problem with Xcode where I get all sorts of errors flagged up in my code (which has previously worked fine). The code compiles and works fine. I tried reinstalling Xcode but it's no different.

To give an example, if I start a new project, I get the error shown in the screenshot about "not being able to build module Cocoa".

I notice that this only happens if I've selected 10.10 as my deployment target. If I use 10.9 then all is well.

Any thoughts on how I can fix this?

Thanks
r

 

[briloronmacrumo]

I get the error shown in the screenshot about "not being able to build module Cocoa".

Have you tried deleting the 'DerivedData' folder contents at: /Users/yourUserID/Library/Developer/Xcode/DerivedData

For good measure I would do both cleans ( with and without the option key ) on Xcode's Product menu

 

[chown33]

If the problem occurs on a new project, then create a new throwaway user account, login to it, create a new Xcode project there, and see if it shows the same problem.

If so, the problem is likely in Xcode itself or one of its components (e.g. the 10.10 SDK).

If the problem doesn't occur with the new user, the problem is likely in a user-specific Xcode file, such as something in ~/Library/Preferences or ~/Library/Application Support.

 

[superscape]

Have you tried deleting the 'DerivedData' folder contents at: /Users/yourUserID/Library/Developer/Xcode/DerivedData

Hi,

That seems to have fixed it. Thanks so much to both of you for your help.