I have a 4,1 -> 5,1 cMP booting off of an NVMe. Currently it has a 10.15 partition and an empty partition for 10.13 - I'd like to use it for my GTX1080.
I installed 10.15 by "recovering" from an SSD in bay 1. However, I don't have any other spare drives with older versions of OS X laying around.
I am trying to download 10.13 and put it on a USB, but I cannot find a 10.13 image anywhere. When I go through the app store and try to download 10.13, the installation makes it about half way before I get a message telling me that 10.13 is too old to install on my computer.
Any ideas?
I installed 10.15 by "recovering" from an SSD in bay 1. However, I don't have any other spare drives with older versions of OS X laying around.
I am trying to download 10.13 and put it on a USB, but I cannot find a 10.13 image anywhere. When I go through the app store and try to download 10.13, the installation makes it about half way before I get a message telling me that 10.13 is too old to install on my computer.
Any ideas?