Mac Pro SMC Firmware Update, version 1.1, 970 KB. Just showed up in my Software Update, wasn't there yesterday. I can't find any info on the net so it must have just been posted? Description: "The SMC Firmware Update adjusts fan behavior in Mac Pro. The updater application will be installed in the /Applications/Utilities folder and will launch automatically. Please follow the instructions in the updater application to complete the process." I just installed it and my SMC version is now 1.7f10. No problems or noticeable differences.