Just as a curiosity for all MacBook Air users still using the 2011 model, which OS do you currently have installed and use? What is your reasoning for not upgrading to the newest supported OS? High Sierra has been excluded from the poll as it is still in beta testing. I currently run Mac OS Yosemite for continued security update support, however will be updating to El Capitan by the end of the year. EDIT: After much debate I've decided to downgrade to a fresh installation of Lion, I'm planning on taking this MacBook to the Falklands next year and just want to use it for light emulation and video playback. I also have Parallels installed with a VM containing a few Linux distros to play around with.