Instruments > device grayed out

Question

I'm running an app on my iOS device but, in Instruments, that device is greyed out.

This also means I can't attach the process (Cant launch iOS app with Instruments on device). Is it anything to do with my earlier question: Instruments > Profile - Revoke and request

Xcode: 6.1.1 iOS: 7.1.2

Any idea why?

Answer 1

I only had to reboot my phone (not my Mac), and then the error went away (Xcode 9.2, iPhone X running 11.2.6).

Answer 2

i was having this issue and resolved it by

1. Unplugging my device
2. Turning my device off
3. Rebooted my mac
4. Turned device back on and plugged into computer after logging back in.

now it shows up in instruments. I tried unplugging device, restarting xcode, but that didn't work. rebooting everything is what did the trick for me.

Answer 3

I met the this problem. Xcode(Version 9.3.1 (9E501)), iphone 7, And I forcely quit the Instrument. It's work

Answer 4

I came across same problem today on xcode7.2.1, iOS 9.2.1, iPhone 6Sp. Resolved by rebooted my mac, my watch and the iPhone.

Answer 5

If your workspace contains several projects and/or several targets, it seems that XCode doesn't know which binary to profile.

Just Edit your scheme -> Profile -> Choose an Executable and it should enable the profiling option.

Answer 6

I don't know which process helped but I force quit AppleMobileDeviceHelper and DTServiceHub in the Activity Monitor and then it started working again (I was able to select my phone without rebooting).

Answer 7

Recently, I confronted the question again on Xcode Version 10.1 (10B61), iphone 7 and Mac 10.14.1 (18B75). I resolved it by upgrading the deployment from 8.0 to 10.1. In fact, I have meet many strange Xcode bugs caused by the version, liking this one(xcode gpu shader profiler)