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

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.