![]() ![]() You will arrive at the rEFInd menu with a 20-second timer, and all three OSs should be visible. After Windows is fully installed and you can use it normally, Option+Power reboot into OSX, then install rEFInd. If ever it reboots into the wrong partition (it shouldn't), then manually shutdown, Option+Power boot, and select the Bootcamp partition manually. Complete the Windows installation process normally. Your Macbook should boot into the Bootcamp installation partition. Laden Sie sich den Boot-Loader herunter und installieren Sie ihn. (If you reboot into the Mac bootloader at this point, Ubuntu should not be visible) Reformat the partition you created in Step 4 for Ubuntu and complete the installation process, then shutdown. Shutdown again and Option+Power restart to get to the Mac bootloader, then select the Ubuntu install disk (should be labeled EFI, there might be two of them, either should work).Create an Ubuntu installation disk whatever way you prefer with (I believe) whatever version you prefer.File format on the Ubuntu partition shouldn't matter at this point. Reduce the size of the OSX partition, then create a new partition for Ubuntu in the empty space. When the computer reboots into the Bootcamp Windows installer, hold down the power button to shut down, then press Option+Power to restart into the Mac bootloader.Launch OSX Bootcamp. Create a Windows installation USB drive (I've done Windows 8 and 10) and create a hard drive partition for Windows.In OSX, remove the Core Storage designation from your OSX partition.(with OSX 10.10 Yosemite, Windows 10, and Ubuntu 14.04 LTS) When I boot my Macbook now I get the rEFInd loader screen with three icons. The whole process takes a few hours, but it works perfectly. Boot Camp Assistant would partition the HD, then you could quit, and then using some boot manager software like rEFIt (now rEFInd), you could use that. I would then have a dual OS X Yosemite and Ubuntu Linux system. Basically, we start the Bootcamp process, then install Ubuntu, then finish the Bootcamp Windows installation. I would like to use Boot Camp Assistant to partition my HD, reserving around 30 GB for Ubuntu. Windows still works best when installed via Bootcamp, and this requires that it be installed both first and last, but we can get around that too. As for the boot loader, the rEFInd bootloader (a spin-off of rEFIt) does recognize Ubuntu. Yosemite declares the OSX partition to be "core storage" (I don't even know what that means), but that designation can be removed easily. The combination of Yosemite and the 2015 hardware introduce two new problems: one, Yosemite doesn't think users should be allowed to resize partitions manually and, two, the 2015 Macbook's bootloader doesn't seem to recognize Ubuntu at all. I was pretty sure there must be an easy way to install all three on a single Macbook, and I was right. I found a few detailed instructions around the web on how to run Yosemite, Windows 8, and Ubuntu on one machine, but they all involve significant terminal work and partition juggling, and I was looking for something a bit more straight forward, a bit cleaner. I bought a Macbook Pro a while back which runs OSX 10.10 Yosemite out of the box, and that introduces a few new hurdles. I've written about triple booting Macbooks before, but the process has changed recently. ![]()
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