Hi everyone, I've just got the new iMac (2019 model) and as I always do after getting a new computer, I install the os system from scratch via bootable usb. I create using createinstallmedia a Mojave bootable usb. I insert the usb pen drive, then start the iMac with option key presses, choose to boot from the installer usb and after that I got the no entry sign. I'm unable to install a clean copy version of Mojave because of that. I've tried the same bootable usb on my mom's MacBook Pro (2018) and no problem... Any help anyone? Thank you very much!