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System Requirements
OS X 10.9 or later

EFI requirement:  
EFI 0116 (MP61.88Z.0116.B00.1311020956)
EFI 0116.02 (MP61.88Z.0116.B02.1311222014)

Model Property requirement: MacPro6,1

Mac Pro EFI Firmware Update v2.0

This update is recommended for all Mac Pro (Late 2013) models.

This update improves system reliability during reboot, resolves an issue with memory self-test, and improves graphics power management when using Boot Camp.

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File Size: 4.64 MB
System Requirements: Mac OS X 10.9 

This update is recommended for MacBook Pro (Retina, 13-inch, late 2013) models.  

This update addresses an issue where the built-in keyboard and Multi-Touch trackpad may become unresponsive.

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File Size: 5.22 MB
System Requirements: Mac OS X 10.9 

This update is recommended for MacBook Pro (Retina, 15-inch, late 2013) models with NVIDIA graphics.  

This update addresses an issue which, in rare cases, may limit the performance of the discrete graphics processor after a system wake or boot.

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Version: 2.6
Post Date: Jan 9, 2013
Download ID: DL1623
File Size: 4.76 MB
System Requirements
OS X 10.8.2

About MacBook Air EFI Firmware Update 2.6

This update is recommended for MacBook Air (mid 2012) models.

This update fixes a color issue with HDMI displays connected to MacBook Air, resolves an issue with Windows which can prevent MacBook Air from booting properly, and also resolves an issue where unplugging a Thunderbolt device may cause the system to freeze when waking from standby.

The MacBook Air EFI Firmware Update will update the EFI firmware on your computer.

Your computer's power cord must be connected and plugged into a working power source. When your MacBook Air restarts, a gray screen will appear with a status bar to indicate the progress of the update. It will take several minutes for the update to complete. Do not disturb or shut off the power on your MacBook Air during this update.

After update EFI ROM will be: MBA51.00EF.B02

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Version: 2.0
Post Date: Dec 17, 2012
Download ID: DL1618
License: Update
File Size: 4.32 MB
System Requirements
Mac OS X 10.8.1 and greater, EFI version 010A
iMac (21.5-inch, Late 2012)

About iMac EFI Update 2.0
This update is recommended for the iMac (21.5-inch, Late 2012).
This update contains general performance fixes pertaining to sleep and Thunderbolt, and improves compatibility when using the 5GHz band in Wi-Fi.
Boot ROM or SMC Version Information: After Update is complete:

Build version: 010A.05
ROM version: IM131.88Z.010A.B05.1211151146

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Version: 1.1
Post Date: Dec 17, 2012
Download ID: DL1619
License: Update
File Size: 4.76 MB
System Requirements
Mac OS X 10.8.1 and greater, EFI version 0106.01 

About MacBook Pro Retina EFI Update v1.1

This update is recommended for all 13-inch MacBook Pro with Retina display (late 2012) models. This update improves sleep performance, enhances Thunderbolt router support, fixes an HDMI display issue, and improves compatibility when using the 5GHz band in Wi-Fi.

Boot ROM or SMC Version Information: After Update is complete:

Build version: 0106.03  

ROM version: MBP102.88Z.0106.B03.1211161133

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Version: 1.7
Post Date: Dec 10, 2012
Download ID: DL1616
License: Update
File Size: 4.53 MB
System Requirements
Mac mini (Late 2012)

About Mac mini EFI Firmware Update 1.7

This update addresses HDMI video flicker issues on Mac mini (Late 2012) computers and is recommended for all users.

The Mac mini EFI Firmware Update will update the EFI firmware on your computer.

Your computer's power cord must be connected and plugged into a working power source. When your Mac mini restarts, a gray screen will appear with a status bar to indicate the progress of the update. It will take several minutes for the update to complete. Do not disturb or shut off the power on your Mac mini during this update.

Mac mini EFI will be updated to 0106.03

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Version: 2.5
Post Date: September 19, 2012
Download ID: DL1592
File Size: 4.76 MB
System Requirements: OS X Lion 10.7.4 or later, OS X 10.8. or later

About MacBook Air EFI Firmware Update 2.5

This update is recommended for MacBook Air (mid 2012) models. This update fixes an issue where Turbo Boost does not activate when using Boot Camp, and resolves an issue where NetBoot does not function properly when using an Ethernet adapter.

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Version: 2.9
Post Date: September 19, 2012
Download ID: DL1593
File Size: 4.29 MB
System Requirements
Mac OS X 10.7.4 or later: OS X 10.8.2 and later

About MacBook Pro EFI Firmware Update 2.9

This update is recommended for MacBook Pro (mid 2012) models. This update resolves an issue which can cause the system to hang during heavy processor loads.