I want to upgrade to iTunes 12.7 on OS X 10.9.5
I have an iMac running OS X 10.9.5. I want to upgrade to iTunes 12.7 so I can connect my new iPhone 8. I can't upgrade to Yosemite though and iTunes needs at least 10.11 to load. Where and how can I get Yosemite? I also thought of upgrading to El Capitan but can't without 10.10 first.