There are multiple ways to repartition the iMac drive, my favourite (probably because it is the easiest & being graphical it is most likely the safest) is to boot the Ubuntu 7.10 (or later) LiveCD & run GParted from the desktop menu. This means you will probably need to boot your archlinux-fallback image the first time and regenerate the initramfs to successfully switch from BIOS to UEFI. When booting through the Apple bootloader (instead of rEFInd) you will be booting in full UEFI mode, instead of BIOS compatibility. # bless -folder=/Volumes/EFI -file=/Volumes/EFI/efi/BOOT/BOOTX64.EFI -setBoot It is best to rename the created EFI/arch_grub/grub圆4_standalone.efi to EFI/BOOT/BOOTX64.EFI, then run the following command from macOS, after mounting the EFI system partition: To change the default boot-option to Arch Linux, you need to bless the earlier created stand-alone UEFI app.

You will probably want to lower the timeout and make Linux the default option, for that you must edit the nf file (See REFInd#Configuration).Īfter successfully installing Arch and Grub you may remove rEFInd (first make sure your stand-alone UEFI app shows up in the Apple bootloader). This built-in bootloader sometimes has problems booting from USB, so it might be a good idea to install rEFInd on your OS X partition. If your iMac has a separate EFI system partition, this menu will also allow you to boot Arch Linux directly (follow these instructions: GRUB/Tips and tricks#GRUB standalone). This allows you to boot from CD, HDD and via WiFi. You can also use an external USB or Firewire drive with which to boot OS X for the firmware updates, and possibly even via optical drive.Īpple computers have a built-in bootloader that can be accessed by holding down the Alt key when switched on. Keeping a small macOS partition allows you to do firmware updates.

It has a black, plastic backplate that is not user-removable. There is only one visible screw on the entire computer, located at the base of the iMac for accessing the memory slots. In August 2007, Apple introduced a complete redesign of the iMac, featuring an aluminum, glass and plastic enclosure. Reason: Complete disregard for Help:Style (Discuss in Talk:IMac Aluminum)

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