Instruments > device grayed out

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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?

Brambling answered 7/3, 2015 at 10:18 Comment(3)

Is your device is configured for development (look at it inside Xcode organizer, devices)? – Alcus 31/12, 2015 at 6:34

Make sure you configure the device for development. Then ensure that the Xcode project settings for the deployment target match your device's OS. Also, ensure that the 'device' option matches the device you are trying to build to. – Barmaid 20/1, 2016 at 18:58

I have the same issue, the device is definitely configured because I've profiled my app before on that device. Have you fixed the issue? – Aggress 27/1, 2016 at 16:44

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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).

Danyelledanyette answered 21/3, 2018 at 23:51 Comment(3)

Rebooted Mac: did not help. Rebooted device: iPad shows up again in Instruments. – Spring 22/5, 2018 at 20:29

I rebooted my Mac and iPhone. Still did not work. Xcode 10.2, iOS 12.2 – Kipton 25/4, 2019 at 12:13

It also worked for me. I also had to close the DropBox application on the mac because it constantly wanted to access the phone to download the pictures. – Epiphysis 30/1, 2020 at 17:31

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i was having this issue and resolved it by

Unplugging my device
Turning my device off
Rebooted my mac
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.

Waggle answered 6/3, 2016 at 21:0 Comment(3)

We're definitely back in windows 98 territory on the mac nowadays. Can't believe how poor the quality of developer they're employing now is! – Shumate 14/1, 2017 at 11:43

As Max noted in this answer, rebooting the Mac shouldn't be necessary (just reboot the iPhone) :) – Vocational 9/5, 2018 at 9:40

with XCode11.5 rebooting my device was enough – Snort 15/3, 2021 at 8:48

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

Lover answered 5/6, 2018 at 5:56 Comment(2)

Thank-you. That fixed it for me and less hassle than rebooting. – Kourtneykovac 5/8, 2020 at 22:25

Restarting phone didn't work for me. Force quitting worked. Thanks. – Lushy 6/2, 2024 at 19:31

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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.

Subsist answered 9/3, 2016 at 8:25 Comment(0)

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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.

Eadmund answered 27/2, 2018 at 10:42 Comment(0)

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It turned out that my iPhone is not trusted my computer.

How to re-trust computers, see: https://www.wikihow.com/Trust-a-Computer-on-an-iPhone

In short, you should reset Location and Privacy in settings, and then plug-in your iPhone again. And you will see 'Trust this computer' again.

Peplos answered 18/3, 2020 at 2:10 Comment(0)

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I had the same problem where Profile was greyed out. It turned out to be I had the device option at the top set to Generic iOS Device

// this will make Profile greyed out

Once I switched it to an actual simulator device or my actual device Profile was no longer greyed out

One other option can be to in Xcode at the top go to Help > search Edit Scheme and select it > on the left side of the screen select Profile > change Executable drop down to your_project's_name.app

Trajan answered 6/4, 2020 at 15:45 Comment(0)

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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).

Pare answered 8/2, 2018 at 18:51 Comment(0)

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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)

Lover answered 21/11, 2018 at 12:0 Comment(0)

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My issue what that it was asking me to trust the computer every time I plugged it in.

To fix it, I had to turn on the Hotspot then turn it back off.

Binate answered 7/7, 2020 at 14:10 Comment(0)

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