virtualbox.org

I have been attempting to install macOS Sierra or High Sierra in VB for quite some time now without success.

The VM boots the disk file successfully and presents the maxOS Utilities dialog.

I have used the Disk Manager to erase the virtual disk successfully.

However when I choose Install macOS I receive the error message

This copy of the Install MacOS application is damaged and can't be used to install macOS

I have tried numerous (too many by far) files of the os software downloaded from various places, including Apple but the message is the same.

Am I making a fundamental error that I am missing somehow?

I am running macOS Catalina 10.15.4 on a 3.4 GHz Quad-core i5 with 24 GB Ram

I hope someone is able to help me before I go bananas!

Many thanks.

Provide a VM log file. With the VM fully shut down, right click it in the GUI. Select "Show Log" and save "VBox.log" (no other file) to a zip file. Attach the zip here.

Many thanks for your reply.

I have attached the log file as you requested.

Cheers.

RoddyJoff wrote: This copy of the Install MacOS application is damaged and can't be used to install macOS
.

In October last year the code signing certificates used by all of the Apple macOS Installers expired. New versions of the installers were released a few days later and can be found with a bit of googling.

Alternatively, you can workaround the the expired certificates with the following steps:

1. Make sure you have a restorable backup of your system (not absolutely required by usually a very good idea)
2. Disconnect your Mac from the Internet. i.e. remove any ethernet cables and turn of wifi. Or pull the plug on your router.
3. Change the system date of your Mac to 1 July 2019
4. Reboot your Mac
5. Install your macOS virtual machine. You should NOT get the damaged message.
6. After you have a running VM shut it down.
7. Close all other applications you are running.
8. Set the system date to the current date
9. Reboot your system
10. Reconnect to the internet

I hope that helps - seems like a lot of steps but it's actually not too bad.

That's a very helpful post. I'm making this topic as sticky so that the info remains visible for a while, plus I changed the topic title to make the relevance clearer.

Many thanks granada29 your suggestion worked a treat.

Now I'm going to have some fun.

Cheers.

Topic marked solved.

Experience tells me that this topic will now attract loads of "I have the same problem, but..." (and goes on to describe completely different problem) posts for the rest of eternity, so I'm going to lock it now before the information is diluted.