![]() This startup option that I am referring to was not the regular hold. Here are instructions for MacBooks: 6) Gently wiggle the RAM card out and put it aside, you will put it back later (do NOT touch the gold bars on the front you could break it) 8 ) Boot up the computer while holding COMMAND+OPTION+P+R (this resets the parameter ram) 13) Now if you boot up the machine you should bypass the Mac firmware password. The iMacs had an option on the screen for guest to choose whether they want to use Mac OS X or Windows XP. Theme support is the primary reason people pick. REFInd, Grub2, and Clover EFI bootloader are probably your best bets out of the 6 options considered. Boot OS X, Windows, and Linux in UEFI or legacy mode on Mac or PC with UEFI or BIOS firmware. If you try to use a manual updater that's not designed for your Mac, or if it's not needed, the installer alerts you and the software isn't installed. I stayed at a hotel in San Francisco and in their lobby were two iMacs for the guests to use, which I thought was definitely different but cool. Clover EFI Bootloader can boot OS X, Windows, and Linux on Mac or PC with UEFI or BIOS firmware. ![]() If the firmware version you see in System Information is newer than what's listed for your Mac, you don't need to apply the updates listed for that model. Select the Hardware section to view the Model Identifier, Boot ROM version, and SMC version numbers.Apple Menu > About this Mac > Overview > System report Use these steps to check your Mac's EFI Boot ROM and SMC firmware versions. If you don't see a firmware version listed in this article, it means that either a firmware update is only available as an automatic update, or no firmware update is needed. ![]() ![]() With Matts iso file I can boot, intall and. If your Mac needs a firmware update and it isn't installed automatically, check to see if a manual updater is listed below. Without this iso image only 32-bit OS can be installed which limits RAM access to 4GB. Some firmware updates are also available as downloads you can install manually. Most firmware updates are automatically installed when you update or upgrade OS X. ![]()
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