Install Mojave on an external drive
I have a MacBook Pro late 2011with HighSierra and I would like to use it to install Mojave on an external drive.
I have "Install Mojave" on a USB-Stick and the external drive connected to my MacBook. I started it with CMD+R and then wanted to use "Install MacOS" to install it on the external drive.
I remember I once did a similar thing where I was offered a choice of the OS and where I wanted to transfer it to. This time all it offers me is El Capitan (not HighSierra) but does not show the Mojave USB-stick.
Any idea what I am doing wrong?
MacBook Pro 13", macOS 10.15