Upgrading MacBook air from 10.6.8 to Sierra I have been given a MacBook air by a friend that needs it repaired. The device is running 10.6.8 and has no available recovery disks. I am going to re-image the device and update it to the newest macOS but I have run into a serious problem. 


Sierra can only be upgraded to if the device is already running 10.7 Lion. It's not. 
I can't access recovery mode through Command + R because that's not a feature on Snow Leopard either. 
I don't have recovery disks and even if I did, it's an air and has no disk drive. 


What in the world should I do?
I'm assuming that you have a Late 2010 MBA or later because an MBA prior to then won't support Sierra.  You will need El Capitan, instead.

I wouldn't recommend upgrading - I personally prefer doing a clean install and migrating over my Apps and Data using the Migration Assistant.

You should be able to download the Sierra Installer via the App Store since it was available to Snow Leopard Users.

Following are the steps you need to take to upgrade your MBA to macOS Sierra


Update (if needed) your MBA to the latest Firmware via a standalone installer.  This will help with the Internet Recovery.
Create a USB Installer of macOS Sierra
Backup your installation to Time Machine
Boot from USB and do a clean installation
Use Migration Assistant to move over your apps and data.