Run it in a VM, that way you can keep your main machine on 10.9 and experiment in the VM with things like this. I guess you already know that 10.9 is no longer

Run it in a VM, that way you can keep your main machine on 10.9 and experiment in the VM with things like this. I guess you already know that 10.9 is no longer supported, so you might want to consider to at least update to 10.10.