Just upgraded to Xcode 8b2 and launched an app I've been working on and got this erro:
[OSStatus] error:[-34018] Error Domain=NSOSStatusErrorDomain Code=-34018 "client has neither application-identifier nor keychain-access-groups entitlements" UserInfo={NSDescription=client has neither application-identifier nor keychain-access-groups entitlements}
Sounds just like https://forums.developer.apple.com/thread/4743 from last year. Seems like for now my app is unable to access the Keychain at all, at least in the simulator. Works fine when I run it on a device. Anyone else seeing this with iOS 10?