My MacBook (13-inch, Aluminum, Late 2008) is getting, understandably, a bit long in the tooth. My laptops have always been second computers for me--my iMac is only about a year old--and I mainly use the laptops for Internet access (browsing, email), writing, and storing trip pictures (I download pictures each day and annotate them so that I don't forget details). As a result, my laptop needs to be portable much more than it does powerful. My Macbook's battery doesn't last at all anymore, even though it's a replacement (an Anker battery bought in February 2015 that seemed to revive battery life for a while, but nowadays it doesn't even last me close to an hour) so I don't know if the issue is with the replacement battery or with the MacBook itself. So I've been casually in the market for a replacement. I'd been waiting for the new MacBooks this fall but was disappointed by what was offered. With only the Pros being refreshed they're a lot of money for what I need, with the non-Strip 13" starting at $1500. If I was getting a primary computer that's not an issue, but for I described above it is. I was considering a 13" Air, but then I wondered about the 12" Macbook. I've read about its downsides--the lack of ports being the major one--but that's not so much an issue for me. The only thing I semi-regularly plug into my MacBook is a SD card (using an adapter, since my MacBook doesn't have the SD slot). A built-in SD slot would have been nice but not crucial (and the new Pros don't have one anyway) and I don't do it that often. The MagSafe adapter with the Air is something to consider, but the Retina display with the MacBook seemed compelling enough that it was a big part of why I was considering the 12", but I don't know if it's decisive. The Air has the longer battery life, but with what I'm using now 9 vs 12 hours seems almost more an abstraction than anything real. And how much will I notice two versus three pounds? Any factors I'm missing, considering the particular requirements I'm talking about?