When you install Windows on a hard drive, it automatically sets the partition scheme of your hard disk to MBR (Master Boot Record). Mac OS X doesn't support this partition scheme, but you can still install Mac OS X Lion on a hard disk with the MBR partition scheme by modifying 'OSInstall.mpkg' and 'OSInstall', two installation files inside your Unibeast USB drive. Dec 11, 2018 Firmware updates aren't installed automatically alongside macOS on Mac Pro (Mid 2010) and Mac Pro (Mid 2012), unlike other Mac models. Follow these steps to ensure that your Mac Pro receives any available firmware updates when you update or reinstall macOS. Mar 24, 2020 Click the Boot Camp icon. From the menu shown, choose Restart in macOS. If you haven't installed the latest Boot Camp updates, you might get the message ”Could not locate the OS X boot volume.' Or use Startup Manager as your Mac starts up: Restart your Mac from the Start menu in Windows. OS X:: Partition Shown As EFI Boot - Mac Volume Not Located Jun 6, 2009. I have 2 partitions on my MacBook drive. One is OS X Leopard, and the other is a Windows XP Bootcamp Partition (FAT32). Open the recovery.sh script in TextEdit. Change the TARGET and MACOSINSTALLER fields inside the script to match the volume and path you want to install a recovery partition to and where the script can find the Mac OS X High Sierra installer. The High Sierra installer is likely on your main drive so just point to that path.
According to WIkipedia, “On Apple–Intel architecture Macintosh computers, the EFI partition is initially blank and not used for booting. However, the EFI partition is used as a staging area for firmware updates.” When people look to create non-standard boot environments or attempt to build a hackintosh, the first step is often mounting and modifying the EFI boot partition. Before you read any further, take note: altering your EFI boot partition is not supported by Apple and The Mac Admin takes no responsibility if you render your computer(s) unbootable by mounting and modifying this partition.
To mount an EFI boot partition, follow these steps:
1. Discover the volume identifier for your EFI boot partition.
Run this command:
The output should look something like this:
In this case, the volume identifier of the EFI partition is disk0s1
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2. Create a mount point.
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A mount point is a directory where a non-booted volume is mounted. On Mac OS X, mount points are typically created in /Volumes. We can create a directory called efi within /Volumes by running the following command:
3. Mount the EFI partition at the efi mount point.
Run the command:
That’s it. Your EFI volume will be mounted. Modify it at your own risk.
If you want to install a 10+GB game (say Shogun 2: Total War, there are many such gigantic games) on windows partition with a dual boot Macbook…..
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however you are stuck with your 160GB hard drive from the 2009 or earlier macbook model (so you may only have 30GB for boot camp and is already filled with junk), here is what you could do:
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What you need: 1. rEFIt bootable CD (or install to hard disk, doesn’t matter) – http://refit.sourceforge.net/doc/c1s5_burning.html
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Steps: 1. boot into gparted tool. Follow simple instructions to start the tool and resize your partitions by dragging them around. GUI is very easy to use so no worries. It may take you 30+mins depending on the size of your disk and the type of tasks you assigned.
2. After the above step, you may not be able to boot into your windows (no windows option on startup), since the starting position of your windows partition is moved and MBR is off-sync-ed.
3. Install rEFit tool (or burn it into a CD and boot from it). Select partition tools by tapping your arrow keys. It will ask you whether to update MBR. Type “Y” and hit ENTER except you have other thoughts.
4. dada! Restart your computer and hold [ALT/OPTION]. Now you have windows option again and it should boot with no trouble. I successfully resized my boot camp and my story ended there. BTW, I was running snow leopard and win xp sp3.
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Everything worked for you too? Then this is the end, go play!
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5. ……if you still cannot boot windows, here are suggestions from the streets: (Not personal tested)
6. Boot your Windows CD. Vista/Windows7 CD -> hit the repair option to fix the boot record. XP CD -> you may need to go to the administrative shell and type fixboot and then fixmbr.
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7. Reboot and you should be able to boot into Windows via the option key as before.