iMac EFI Firmware Update 1.9

System Requirements:

  • OS X Lion 10.7.3

File Size: 3.77 MB

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This update fixes several issues to improve the stability of iMac (Mid 2011) computers and is recommended for all users.

This update improves the reliability of booting from the network, addresses an issue that can prevent HDCP authentication after a reboot, and resolves an issue with boot device selection when a USB storage device is hot-plugged.

Boot ROM or SMC Version Information: IM121.0047.B1F

Supported Languages:  Bahasa Indonesia, British English, Crna Gora, Dansk, Deutsch, Eesti, English, Español, Français, Hrvatski, Italiano, Latviešu, Lietuvių, Magyar, Melayu (Malaysia), Nederlands, Norsk Bokmål, Polski, Português, Português (Brasil), Pусский, Română, Shqip, Slovenčina, Slovenščina (Slovenija), Suomi, Svensk, Tiếng Việt, Türkçe, Íslenska, Čeština, Ελληνικά, Български, Македонија, Українська, עברית, العربية (مصر), ไทย, 日本語, 简体中文, 繁體中文, 한국어
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