Mac os x efi boot options

In the part when I had to format my partitions for installation, Windows created 2 partitions in the free space: The installation went well, no errors were raised, but when I pressed the options key at startup to boot to Windows, my Mac recognized my Windows partition as "EFI Boot" so now I have 3 options when I pressed the Options key: That is not really a big problem to me, but then when I started using Windows, I couldn't find a way to make the audio drivers working.

I couldn't install Microsoft Office either. So, I booted into my Macintosh HD partition, and use disk utility to remove the Windows partition and the Microsoft Reserved partition. Then, I reinstalled Windows 8. Boot camp install of Windows 7 issue, no bootable devices. Everything went well and the audio is now working, but now, when I press the Options key at startup, I have 4 options: Recovery Your PC needs to be repaired A required device isn't connected or can't be accessed.

Press Enter to try again Press F8 for Startup settings.

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Apple, Boot, and Microsoft. I tried deleting the Microsoft folder and I kept the copy of it somewhere else , and boot into the EFI Boot again, my computer froze and restarted.

The rEFIt Project

It's not creating any problems with my Mac or Windows partitions, but I'm very curious about what it actually is, what does it have to do with my computer, and why does it decide to show up when I pressed the options key? The rest of your question, which again is repeated below, does require further explanation. This is part of the UEFI specification.

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  3. Fixing a Broken EFI Partition on Mac.
  4. For example, if you go to the " uefi. Sections 3. Ironically, these boot only in BIOS mode! Therefore, to rid your computer of the dangerous hybrid MBR, you'll need to jump through some hoops.

    Proceed With Caution – This Procedure Can Render Your Mac Inoperable If You Aren’t Careful

    An alternative to all of this is to run Ubuntu in a virtual environment, such as VirtualBox. This can be a good solution in some cases, but it doesn't give Linux direct access to the hardware and you'll lose some speed. These include:. Enthusiasts have been working to get Windows to boot in EFI mode on Macs, with some progress and considerable pain. See this thread on MacRumors, for example.

    bootcamp - Mysterious "EFI Boot" partition appearing at startup? - Ask Different

    This goal appears to be more attainable with Windows 8 than with Windows 7, and success depends on your specific Mac model. It's possible that your preferred distribution already supports direct EFI installation, in which case the problem of installing to a Mac in EFI mode may not exist.

    Check your distribution's documentation to be sure. I've tested this procedure only on my first-generation Intel-based Mac Mini. It's possible that the bit version has different requirements, or you may need to do things differently on newer bit Macs. For some reason, although I was able to install Ubuntu If you have this problem, you'll have to install rEFInd before you can install Ubuntu.

    With these items in hand, you can proceed with installing Ubuntu, and then fix it up so that it doesn't use a hybrid MBR. If you've already got a working dual-boot configuration with OS X and Ubuntu, you can skip this section and jump ahead to "Fixing the Installation. When the installation finishes, the computer will reboot—straight into Mac OS X! See the below note if it doesn't boot, though. You must now proceed with fixing it up in various ways If by chance your computer won't boot, try booting the Ubuntu installer but click Try Ubuntu to run it in its live CD mode.

    With any luck, OS X will start up again, and you can proceed with step 8. If you've followed the directions, your computer should now be booted into OS X, looking very much like it did before.

    Mac startup key combinations

    Ubuntu is installed, however, and your disk has a hybrid MBR. You must now take steps to return the hybrid MBR to a safer protective MBR, as the GPT standard requires, and to set up a boot loader that enables you to select which OS to boot when the computer powers up. To do so, follow these steps:.

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    The rEFInd installation instructions presented here are simplified. For the full instructions, including some variants, see the rEFInd installation page. If you're using a 3. At this point, it should be possible to boot Linux by rebooting the computer and selecting one of the vmlinuz- version entries in rEFInd's menu. If this doesn't work, continue with the main procedure described here Step 2 explains how it works on both machines.

    Mount & Access EFI Partition on Mac / Windows / Linux !

    Nov 17, 6: Nov 17, 8: I did not use this installation with the iMac since your recommendation not to use it with multiple machines. Nov 17, 9: As long as the SSD works properly on the Mac, without any driver issues, continue to use it. Nov 23, 9: Nov 23, 3: Communities Contact Support. Sign in. Browse Search.

    Some Caveats

    Ask a question. User profile for user: Windows Software Speciality level out of ten: Both iMac can run the same Windows installation from that external drive without issues. If I select the "EFI" option, it shows me a blue screen saying: I'm certain that none of the machines have any Windows stuff on it. Thank you.