You could have downloaded MacBook Air SMC Update 2.0 for Mac from our application library for free. This free software for Mac OS X was originally developed by Apple Inc. The program lies within System Tools, more precisely System Optimization. Our built-in antivirus checked this Mac download and rated it as 100% safe.
From the developer:
This update is recommended for MacBook Air (Mid 2013) models. This update addresses an issue which may cause the battery to drain faster than expected when the lid is closed.
The version change is reflected in the System Profiler available on the Mac.
You may want to check out more software for Mac, such as MacBook Pro SMC Firmware Update, which might be related to MacBook Air SMC Update.