Logic Pro Download Failed

Logic Pro now requires macOS 10.13.6 or newer. You have 2 OS's listed on 2 computers so if your 2011 iMac is still on 10.11 it will not download. Make sure your computer specs meet the requirements for Logic.

Hope this Helps, Greg

The basic content installer certificate is no longer signed.

Temporarily put the date back on your computer, run Logic 9, let it do the basic content download and install then you can put your computer back to the current date.

OK. We need to clarify things here. Which version of Logic do you have or had: Logic Pro 9 or Logic Pro X? Provide exact version number.

Logic Pro 9 is not compatible with recent versions of macOS. Why did you update to macOS 10.13?

What happened exactly when you tried what octopi suggested about the system date?

WD

You updated to macOS 10.13 and then to Logic Pro X. I assume it is version 10.4.8, right?

From that point, forget Logic Pro 9 and about changing the date of the computer.

Restart the computer and open Logic Pro X. What happens?

WD

OK, if you made a full, bootable backup of your whole hard drive before you updated, yes, you can go back.

If not, it's tricky, tedious and you'll probably lose things.

Under your current OS, log into the App store with the Apple ID you used when you first purchased Logic X.

You should be able to update it to a bootable version under the 'Purchased' tab.

Yes, Wildrums is right. If you've upped the OS, that's the end of Logic 9 for you.

The date change only applied to your old OS and specifically, Logic 9 getting the basic content through Logic.

Logic 9 gets that content directly, not through a browser. A browser will not work with the date put back (as you discovered) but the content is not retrieved through a browser. I've done 3 of these in the 2 months before lockdown with people running 10.11.6. The date went back, Logic 9 was booted, it got the basic content, the date was returned to normal.

Sorry it didn't work for you but on your current OS Logic 9 is no more.

... back to 2016!! Sorry, should have put that in my first post.