Can I package for Yosemite on ue4.15?

Hi there. Just wondering if there is a way to package a Yosemite compatible version of my game from ue4.15. It seems Metal v1.1 requires 10.11.4 or higher to run, but is there a way to circumvent this. Is there some way to use a legacy tech that will run on Yosemite? Or is there a way to run my current project on a legacy version of Ue4 that can support older OS X versions?

Thanks.