Background Info: A day ago, I got a new MacBook Pro 16 with Catalina installed for work, this is my first Mac. I got everything set up on my laptop and proceeded to get my development environment setup. During this setup, I was messing with permissions around my root directory (big mistake, I know). After messing around with permissions, the 'sudo' command would error out as well as other issues like System Preferences not opening. I tried a few things, but eventually called Apple to get support. They suggested the only way to really fix this issue is to reinstall MacOS.
The Current Issue: Apple support was unable to help me reinstall MacOS. We tried to reinstall via Recovery Mode and it would error out each time at the end of the installation. Below is the error I receive when trying to install MacOS:
We have deleted and recreated the Macintosh HD image and tried installing after that, reset the SMC, ran First Aid on the image. Nothing has worked, every time I try to install MacOS I get this error. The error also appears at the very end of the download / installation process, usually at the '2 Minutes Remaining' mark.
Please let me know if I can provide more information.
Best Answer
There was a known issue with upgrading or installing Macs with a T2 chip, such as yours, to macOS 10.15.6. Apple have yet to acknowledge the problem but have rolled out (about 3 hours ago) a new update to the software catalog that is reported to fix the problem.
Give it another try now.