I\'ve been running my app on an iPhone 5 /iOS 6, but when I try to run it on an iPhone 4S / iOS6 I get \"The run destination iOS Device is not valid for running the scheme N
Just quit XCode and restart (XCode 9.0.1)
Other solutions might work for other scenarios but, in case using Xcode 11, I went into "Build Settings" of my test target and changed to universal under "Deployment"->"Targeted Device Family"
Select your project, Under Targets, select your main target, then on the Build Settings Tab, there is one field that says "Valid Architectures". Make sure "armv7" is also there. You probably only have armv7s right now.
I am using XCode 8.2.1 having same problem.
Solution:
->Go to Devices
-> Add additional simulators
->Right Click simulator u are using
->Show in Run Destination Menu <-Enable this Option
Switching to a different USB port and restarting Xcode solved the problem. Experienced this issue on iMac running Xcode 9.1 whenever I tried connecting any iOS device to one specific USB port. If your USB ports stopped working, check this.
I faced this issue in XCode 9, but later realised that for some reasons I had unchecked run destination in "Devices & Simulators" window