'Xcode error: Failed to prepare device for development

I have updated to Xcode 12.3 beta. device version is 14.2, but Xcode complaining:

Errors were encountered while preparing your device for development. Please check the Devices and Simulators Window.

Failed to prepare device for development

iPhone directly connected to MacBook. I have tried all mumbo jumbos on the web. but no success any idea?

Unable to prepare DEVICE for development

Please check the connection to the device, and review all errors in the Devices and Simulators window.

Solution 1:^[1]

A simple phone restart will fix it

I have had to come back to this SO question twice in the past couple weeks. First time, I did have to update my Xcode and iOS versions, which fixed the issue. Now, the issue has returned, but there are no updates. I tried disconnecting and reconnecting my phone from my laptop, but to no avail.

What fixed it the second time was merely restarting my phone. I am curious if that would have fixed it the first time too, without needing to have updated.

I know this is just echoing the other answers here, but at the very least, I would recommend just starting with a simple phone restart and seeing if that fixes your problem. Here is the specific screenshot that I encountered, in case yours is the same (pro tip: you can open up the "Devices and Simulators" window by going to Window -> Devices and Simulators shift-command-2).

Solution 2:^[2]

Exact same problem here, this solved the issue for me:

Delete the app from the phone
Clean the Build Folder with: ? + shift + K
Delete derived data
Unpair device (from ? + shift + 2 window)
Disconnect iPhone
Restart iPhone
Restart Mac
Trust

After this, it worked for me.

Solution 3:^[3]

This error shows because of iPhone OS version is not supported by Xcode that's why this warning popped up, so check which max ios version is supported by Xcode which you are using.

In my case, the Xcode version is 13.1 and my iOS version is 15.4 so what I did, First downloaded device support version 15.4 from here (Download according to your device version) and added this to my Xcode.

steps to add the file in Xcode:-

Go to Applications > Right click on Xcode and Select Show Package Contents > Contents > Developer > Platforms > iPhoneOS.platform > DeviceSupport.
Extract your device support file to DeviceSupport Folder.
Restart Xcode and unplug and plug in your device.

Solution 4:^[4]

I restarted my iPhone(14.2); now both Xcode 12.3 beta and 12.2 can run app on my device.

Solution 5:^[5]

I could not get the phone to authorize until I had the paired Apple Watch trust the computer as well. A more helpful error message could be imagined.

Both the iPhone and the paired Apple Watch must trust the computer before the phone can be successfully prepared for development.

Solution 6:^[6]

In my case was to keep the iOS version with my Xcode version in sync.

Xcode 12.3 with iOS 14.3

Solution 7:^[7]

Thanks Matt for hint: Updating device iOS to 12.3 beta fixed the problem.

if you updated you iOS to latest beta version, you should also use latest Xcode beta version.

Solution 8:^[8]

What worked for me was to go to Xcode Devices and Simulators window, then ...

right click on the Connected device, and select "Show Provisioning Profiles" menu item, then delete all the provisioning profiles,
right click on the Connected device, and select "Unpair Device" menu item
Unplug and reboot the phone

Solution 9:^[9]

I tried most suggestions here. The only thing that ended up working was unpairing my phone in Xcode then unpairing my apple watch from my iPhone. Connects just fine now. iOS (14.3) Xcode (12.3)

Solution 10:^[10]

Exact the same problem with Xcode 12.3 beta ; for me, just have to: Disconnect the phone Restart the phone still on ios14.2

Solution 11:^[11]

-> data cable off

-> data cable on

and it works :)

Solution 12:^[12]

Solution: Update your Xcode to a newer release date than your iOS Release Date.

Solution 13:^[13]

I experienced this problem when using the iPhone's personal hotspot on my Mac. The fix was to disconnect the phone from the computer, then disconnect from the personal hotspot and reconnect again. Apparently this makes the mac use the wifi hotspot (and not the usb hotspot on the iPhone, which messes things up when debugging).

Solution 14:^[14]

As many people mentioned/suggested, restarting my iPhone solved the problem.

My setups are: Catalina 10.15.7, Android Studio 4.0, Flutter 2.01,and Xcode 12.4.

Solution 15:^[15]

I think having an apple watch paired to your iphone causes some issues.

I had trusted from my apple watch, but was still having this issue. Unparing my apple watch from my iphone was the only thing that worked for me:

unpair apple watch from iphone
unpair iphone from xcode

Restart both, and don't pair apple watch until the iphone is paired.

and, if you have any other problems, and are using flutter, run flutter doctor, and ensure you have cocoapods installed.

and once again, if Flutter issues, follow the details here to ensure you have your signing setup correctly

also, if things aren't working, then do a flutter clean, and then try again.

Solution 16:^[16]

I just solved my issue removing the iPhone cable and putting it back.

Solution 17:^[17]

This solved the issue for me:

Delete the app from the phone
Clean the Build Folder with: ? + shift + K
Unpair device ? + shift + 2
Disconnect iPhone

Solution 18:^[18]

Updating Xcode is a fix because old versions of Xcode can't talk to new versions of iOS (see https://developer.apple.com/support/xcode/ for compatibility).

If you're stuck on an old version of Xcode you can use something like https://github.com/iGhibli/iOS-DeviceSupport or https://github.com/filsv/iPhoneOSDeviceSupport which installs the newer device support files into older versions of Xcode.

Solution 19:^[19]

Nothing from the above listed helped me and also I have encountered this problem when the app was removed for a while. But turning off the phone for 10 mins solved the problem.

Solution 20:^[20]

My Current Setting and Versions: XCode 12.4 and iOS 14.4

I had to update XCode since my iOS was updated. This fixed the compiler error in Unity and then the same message popped up during deployment. All I did was disconnect/re-connect.

Solution 21:^[21]

Restarting the iPad works for me every time!

Solution 22:^[22]

I just had to unpair the phone from Xcode's Devices and Simulators screen and then tap Trust when connecting it to the computer to make my Watch work with Xcode

Solution 23:^[23]

cmd + shift + 2
Click the red cross to check error detail
In most cases, the error message shows your xcode supported iOS version is lower than your iPhone's iOS version.
Update your xcode.

Solution 24:^[24]

In my case, after updating iPhone to a newer iOS version then got this issue.

The solution is needed to update XCode to the latest version and everything is ok.

Solution 25:^[25]

I had to change the iOs Deployment target to "iOs 15". Then it worked. After that, I just set it back to iOS 12, and everything keeps working.

Solution 26:^[26]

If nothing worked for you, try the below steps.

Update the Xcode
Update the iOS version
Connect mac and iPhone to the same wifi

Solution 27:^[27]

just Clean the Build Folder with: ? + shift + K

Solution 28:^[28]

I got it resolved today by upgrading OS on my Mac to 12.3.1 and Xcode to 13.3.1 as well as restarting and re-connecting devices couple of times.

Solution 29:^[29]

In my case solution was:

General settings on phone device
Profiles & Device Management
Open developer app and click on Trust

Solution 30:^[30]

I got the same error message after updating Xcode to 12.4. I have disconnected and reconnected iPad. Then, I have waited for 1 or 2 minutes for Xcode to process device's cache files. Finally, I could run my application in device.

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution	Source
Solution 1	bshirley
Solution 2	Pranav Kasetti
Solution 3	Rajni Gujarati
Solution 4	AlBlue
Solution 5	DrSmart
Solution 6	FBC
Solution 7
Solution 8	Tache
Solution 9	pkamb
Solution 10	david
Solution 11	Haseeb Javed
Solution 12	Breno Medeiros de Oliveira
Solution 13	Sean Goudarzi
Solution 14	dwcho
Solution 15
Solution 16	Bruno Ramos
Solution 17	Syscall
Solution 18	tschumann
Solution 19	Nikolai Prokofev
Solution 20	Sau
Solution 21	Ahmed Fathi
Solution 22	budiDino
Solution 23	Louis Liang
Solution 24	Binh Ho
Solution 25	user1383029
Solution 26	Sam
Solution 27	islam XDeveloper
Solution 28	marika.daboja
Solution 29	Haris Dautovi?
Solution 30	Aybek Can Kaya

'Xcode error: Failed to prepare device for development

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