Can't install app to device

[straber]

I just purchased a new MacBook and can't successfully get Xcode to run my apps on a device. I've used Apple's Provisioning Assistant, installed new provisioning profiles and my certificate, but I always get the error "A valid provisioning profile for this executable was not found." The only weird thing I can see is that in keychain, next to my certificate it does not have the triangle that expands and says "iOS Developer" under it like it did on my old laptop.

Does anyone know what I'm doing wrong or how to get it let me run my apps on devices again?

Thanks in advance for any help.

[KoolStar]

This typically means that the private key is not added to the keychain. I would recommend deleting the signer identity and try re adding it to the keychain.