Just six days after the previous release, Apple on Tuesday has released a new version
of the forthcoming 10.8.4 update to developers. The new build, 12E36, lists no known changes or issues, and asks developers again
to focus on Wi-Fi, Safari and graphics drivers. It is known that the new build includes support for the emerging 802.11ac standard
, suggesting possible new model updates that will also support the protocols. The 10.8.4 release is also said to improve battery life somewhat, and issues with Wi-Fi and waking from sleep.
The 802.11ac protocol is a successor to the existing 802.11n standard, though the former had not yet been ratified even though the standard is now complete (a similar situation occurred with 802.11n, with products available years before the standard was finally ratified). Once widespread, 802.11ac should result in faster network speeds and greater range using the 5GHz band currently employed by 802.11n. No timeframe for a final release of 10.8.4 has been given.