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#HOW TO INSTALL UBUNTU FROM USB MAC CRACKED#
#HOW TO INSTALL UBUNTU FROM USB MAC INSTALL#
#HOW TO INSTALL UBUNTU FROM USB MAC UPDATE#
#HOW TO INSTALL UBUNTU FROM USB MAC MANUAL#
#HOW TO INSTALL UBUNTU FROM USB MAC FULL#

I choose to add a bootloader to the External drive (not the iMac drive)Īfter the successful installation, I was shocked when I couldn’t boot my OS X. I created the following partition scheme on that external drive: EFI (200MB FAT), BOOT (200MB EXT2) and / (20GB EXT4) I’ve installed Ubuntu on external USB 3.0 hard drive on an iMac late 2013. My story (can be useful to someone with the same problem - so it's my turn to help the community): I detailed the instructions here: Ubuntu installation on USB stick with pure EFI boot (Mac compatible) Image of the Mac boot menu with Ubuntu entry The system is now bootable from any Mac by simply pressing and holding the "Option" key at startup. $ sudo grub-mkconfig -o /boot/grub/grub.cfg $ sudo sed -i 's/GRUB_TIMEOUT=10/GRUB_TIMEOUT=0.1/' /etc/default/grub

#HOW TO INSTALL UBUNTU FROM USB MAC INSTALL#

Install GRUB: $ sudo grub-install -target x86_64-efi -boot-directory=/boot -efi-directory=/boot/efi -bootloader-id="$(lsb_release -ds)"īless the bootloader code: $ sudo hfs-bless "/boot/efi/EFI/$(lsb_release -ds)/System/Library/CoreServices/boot.efi"Ĭreate the GRUB configuration: $ sudo sed -i 's/GRUB_HIDDEN/#GRUB_HIDDEN/g' /etc/default/grub $ sudo bash -c 'echo "This file is required for booting" > /boot/efi/mach_kernel' $ sudo bash -c 'echo "This file is required for booting" > "/boot/efi/EFI/$(lsb_release -ds)/mach_kernel"'

boot/efi vfat defaults 0 1 in your /etc/fstab file with UUID= /boot/efi auto defaults 0 0Ĭreate the required directories and files: $ sudo mkdir -p "/boot/efi/EFI/$(lsb_release -ds)/" Use gdisk and mkfs.hfsplus to replace the existing partition with an Apple HFS/HFS+ one $ sudo apt-get install mactel-boot hfsprogs gdisk grub-efi-amd64

#HOW TO INSTALL UBUNTU FROM USB MAC UPDATE#

Install required packages: $ sudo apt-get update

#HOW TO INSTALL UBUNTU FROM USB MAC MANUAL#

perform a manual boot of the installed Ubuntu system.restart your Mac and start the grub command line using the Ubuntu live USB and pressing 'c' when the GRUB bootloader shows up.erase and install Ubuntu on your destination USB drive.prevent any bootloader installation by starting the installer via the ubiquity -no-bootloader command via Terminal.start the Ubuntu live version by selecting "Try Ubuntu without installing".If you prefer not to change your Mac's default boot loader and have your USB key bootable from any Mac here is the solution I found: I have documented this in more detail here: Then when you reboot, you can "EFI Boot" to rEFInd, and there should be an option to boot GRUB/linux.

#HOW TO INSTALL UBUNTU FROM USB MAC FULL#

(you can drag the file into command prompt to get full path) refind-install -–usedefault /dev/disk3s1 Install rEFInd on your USB's EFI partition.

Follow the gdisk recipe at under "Fixing the installation" point 6.

execute "diskutil list" from the console and note the device name, and the EFI partition (e.

Get gdisk (pkg installer for OS X) and rEFInd binaries.

One or more other partitions to hold Ubuntu proper (e.

Here's a recipe that works (at least, on my iMac with Ubuntu 14.04): I sincerely hope some other poor soul gets some value out of this.

#HOW TO INSTALL UBUNTU FROM USB MAC CRACKED#

Well, I spent a second whole day on it and now I've cracked it. If I can get this solved I will place a clear guide on the web somewhere!

Can boot, rEFInd loads, there is an option to boot ext2_圆4.EFI(?) but no Ubuntu/vmlinuz.

Copied ext2_圆4 to /EFI/boot and /EFI/refind.

Put rEFInd on a another, FAT32 partition which contains /EFI directory.

USB disk has ext2 /boot partition (with vmlinuz image on it), and ext4 / partition with the rest of Ubuntu 14.04 installed.

However, I think I must be close to cracking this and hope somebody can point to a step-by-step guide somewhere. I'm a bit stuck at this point, and the next steps will have to be a detailed study of bootloaders and EFI. I have an ext2 /boot partition on the same disk, and copied ext2_圆4.efi into the /EFI directory, but no go.

So, I've managed to get rEFInd installed on a partition on the external drive but it does not detect the Ubuntu installation. However, the common thread appears to be using rEFInd to rejig the boot options. I have Googled extensively and I'm sure it's possible to get the Mac to boot it, but the instructions I've found have been either too vague ( Installing Ubuntu on and External Hard Drive and boot in a Mac) or in one case, too complex ( ) to make much sense. However, contrary to some assertions here and elsewhere, after restarting the result is not detected by the Mac as bootable. I can easily create a bootable USB stick and use that to install Ubuntu 14.04 onto a properly partitioned USB device. I wish to run Ubuntu on my iMac from external USB storage, either an external disk or a flash drive.