Apple has released three System Management Controller (SMC) firmware updates for its MacBook lineup: MacBook SMC Firmware Update 1.5 (494 KB), MacBook Pro SMC Firmware Update 1.6 (666 KB), and MacBook Air SMC Update 1.8 (982 KB). All three address a “rare issue” that caused laptops with a battery that had accumulated more than 1,000 charge cycles to shut down and possibly fail to boot back up again. According to this Apple support page, all recent MacBook Pro and MacBook Air models (as well as MacBook models from 2009 and later) have a lifetime expectancy of 1,000 charge cycles. As always with firmware updates, we recommend relying on Software Update or the App Store app to ensure you get the firmware update for your specific model, and be careful not to interrupt the update process. (Free)
Option-Click AirPort Menu for Network Details
If you hold down the Option key while clicking the AirPort menu in Mac OS X 10.5 Leopard, you'll see not just the names of nearby Wi-Fi networks, but additional details about the selected network. Details include the MAC address of the network, the channel used by the base station, the signal strength (a negative number; the closer to zero it is, the stronger the signal), and the transmit rate in megabits per second showing actual network throughput. If you hover the cursor over the name of a network to which you're not connected, a little yellow pop-up shows the signal strength and type of encryption.
- MacBook Pro SMC Firmware Update 1.7 (12 Feb 13)
SMC Firmware Updates for MacBook, MacBook Pro, and MacBook Air
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