Yeah, that bit's frustrating if you don't have access to an Intel Mac. And I had the same experience as you with Apple's Internet Recovery — I must've tried it

Yeah, that bit's frustrating if you don't have access to an Intel Mac. And I had the same experience as you with Apple's Internet Recovery — I must've tried it 20 times without success, and as far as I can tell the problem is Apple's. LMK if I can send you a DMG with an OpenCore-enabled Yosemite installer on it. I believe I just need to know your exact model, which you can look at up at https://everymac.com/ultimate-mac-lookup/ https://everymac.com/ultimate-mac-lookup/. (I temporarily put my email in my HN profile.)