Following the release of its Wi-Fi update for 2012 Macs on Monday, Apple rolled out EFI updates for the new iMac and 13-inch Retina Display MacBook Pro. The updates address Thunderbolt and Wi-Fi issues, along with sleep-related problems.
EFI update for 13-inch Retina MacBook Pro addresses Thunderbolt, HDMI issues
According to Apple's release notes, the updates also include general performance fixes. MacBook Pro owners also get fixes for HDMI display issues.