Been waiting for a MacBook Air refresh? Breathe easy, friend, because one has arrived — well, sort of. Cupertino has quietly updated its online store with a familiar looking ultraportable, matching last years model almost spec for spec: 4GB of RAM, 128 or 256GB of flash storage, a 1,440 x 900 resolution display, Intel HD 5000 graphics and a slim wedge frame with all the trimmings — Thunderbolt and USB 3.0 ports and a SDXC card reader.