MobileDevice.pkg untrusted, cannot open Xcode after OS X update

Question

After an automatic update of macOS v10.15 (Catalina), I am unable to open Xcode. Xcode prompts me to install additional components but the installation fails because of Mobi

Answer 1

Reinstall Xcode 11.1 from https://developer.apple.com/download/more/ . Afterwards the update works.

Answer 2

For me, I just uninstalled (deleted the app from the Applications folder) and then went back to app store and clicked the cloud icon and it downloaded fresh and installed. Now all is good and back to normal.

Answer 3

At macOS Catalina

cd /Applications/Xcode.app/Contents/Resources/Packages
sudo rm -rf MobileDevice.pkg
sudo rm -rf MobileDeviceDevelopment.pkg 

Try again. It means you entered on the Xcode downloaded packages and remove it. I really don't understand how Apple do but if you remove Xcode will download it again and revalidates.

Some remarks, I'm on XCODE Version 11.0 (11A420a) if you are not this is not guaranteed to work.

Answer 4

Here's what I did to resolve:

Right click the xcode.app > show package contents > Contents > Developer > Platforms > iPhoneOS.platform > Device Support

I am on XCode 10.2.1. I had downloaded a 13.7 folder and contents from an external GitHub site and imported that folder into here for running my app on a physical iPhone Xr. I am prevented from upgrading to Catalina on my dev machine. Deleting the 13.7 folder and then re-launching XCode resolved the issue for me.

Answer 5

You may solve this issue by setting the date of your Mac as October 1st, 2019. But this is just a hack! The real solution (suggested by apple) is this:

All you have to is to upgrade Xcode

But there is a known Issues on apple developers site

Xcode may fail to update from the Mac App Store after updating to macOS Catalina. (56061273)

Apple suggests this:

To trigger a new download you can delete the existing Xcode.app or temporarily change the file extension so it is no longer visible to the App Store.

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Always working solution for all Xcode issues:

1. Go here and log in.

2. Then download the xib from here.

More information here on this answer.

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##Answer to this specific issue##

Get rid of those packages.

cd /Applications/Xcode.app/Contents/Resources/Packages
sudo rm -rf MobileDevice.pkg
sudo rm -rf MobileDeviceDevelopment.pkg 

Xcode will install all of them again for you.

Answer 6

I didn't have Xcode 11.1 installed and even though I could open and run the 11.0 after the below workaround I could not update to 11.1 as the update always failed. So I have just re-installed the whole app from the App-Store - you could probably also do this instead of the below method.

I have tried setting my system time to 1st October 2019 when the certificate should had been still valid. After that I tried to open Xcode and followed the component install which went well and now I am able to work with Xcode again.