Present state MacBook Air late 2010 I have installed and was using osx yosemities 10.10 Ran into error and wanted to reinstall. I have erased drive. When I use remote recovery command R My MBA assumes it's a developer account and recovery is set to Yosemities. When I attempt to login to my Apple ID to download Yosemites osx 10.10. I get a error --> temporary unavailable. Note: I'm not a registered developer thus laptop is not registered as developer by unit identification #. Meaning apple would reject @ sever. MBA has no optical drive. No other Macs In reach. Don't have a usb. I have a terabyte enteral hd. Very slow. What options do I have and how do I proceed to install a OS. I've attempted to make a bootable drive partition and un partitioned. Failed.