Begin by connecting the storage device to your Mac, and then launch Disk Utility using Spotlight.The oldest Windows OS that exFAT can work with is Windows XP SP3, while the oldest Mac OS is Mac 10.6.5 Snow Leopard. Even if the Mac is unable to mount the storage, following this method will enable you to format the storage. Mac computers are capable of formatting any storage device (internal or external) such as HDD/SSD, USB flash drive, and external storage.What if you want to share data between the two operating systems, for instance? Windows can’t access Mac’s HFS+ file system and Apple’s implementation of NTFS drivers to access Windows file systems is so buggy, they only dare to give you read access. But BootCamp doesn’t give you enough flexibility. Once finished, you can select which OS to boot by pressing “alt” when the boot chime sounds. It will ask you how much space you want to allocate for each environment, ask you for a Windows 8 or 10 ISO or CD-ROM, and then start the process. The Best Format for External Hard DrivesInstalling Windows 10 alongside with Mac OS is pretty straightforward with Apple’s BootCamp.
![]() Format For Windows And Mac OS IsTo disable the integrity protection, enter csrutil disable Once loaded, in the top menu select Utilities->Terminal Reboot your Mac and at the boot chime, press cmd-r to boot into the recovery image. PreparationTo make necessary changes to system files, you must disable the integrity checks of El Capitan Do not follow it unless you know what you are doing and most of all: create a backup first ! I will not take any responsibility for loss of data or wrecked OS installations (incl. On a CD-less Mac, you’ll need the ISO images of Windows 8 or 10, not the CD. There should be only one partition on the disk for OSX - otherwise BootCamp will refuse to do its work. You can check with csrutil status if it’s enabled or not. Specify the downloaded ISO and select the partition sizes. Start BootCamp ( Applications/Utilities/Bootcamp Assistant) Win10_1511_1_English_x64.iso) If you do, you might not be able to shrink the Windows partition sufficiently, and you’ll have to start over. Once it’s (almost) finished and logs you in to the desktop, don’t do anything else yet! Keep the automatically started BootCamp installer open but don’t proceed yet. Let Bootcamp install Windows and restart as desired. If you want you can add a partition for Linux Swap space (I use a swapfile on the 25GB partition instead). I added a 25GB partition for Ubunutu Linux and used the remaining 250GB for a shared NTFS Data partition (all 3 OS will use it to store Documents, Source Code, Java Applications, Music, Movies). Don’t worry, although we already have 4 partitions, it’s a GPT partitioned disk (hopefully) which doesn’t have the limitation of 4 primary disks like a MBR disk. As it’s so convenient, you can use the Windows tool to create the remaining partitions. I chose a value so the final size of the windows partition is 100GB. Now, enter the amount of MB to shrink the Windows Partition. You can switch between the OS by pressing the Alt key during boot. Once the partitions are configured to your satisfaction, continue the BootCamp installer.You have a dual boot system with partitions prepared for Linux and data sharing. The second is the HFS+ partition which contains the OSX and the third is the OSX recovery partition (the one you boot into with cmd-r). Make sure to use the 64-bit variant and not the one built for Macs. You have downloaded a 64bit variant of a Linux distribution (I chose Ubuntu Desktop). You have prepped all partitions as described above. Save files on my passport for macThis will add Linux' EFI bootloader to the existing collection.Check again in the partition overview that only the partitions you want to install Linux on, or want to use as swap disk, have the “Format?” checkbox checked. Format the disk as ext4 partition and assign it to “/”.IMPORTANT: before you continue, select /dev/sda1 as target for the bootloader installation. Choose “Do something else” - otherwise you really do something else (like pay a visit to the Mac store to re-install OSX + recovery image).Check that the first partition is recognized as EFI boot partition (/dev/sda1).Select the partition intended to install Linux (in my setup it was the /dev/sda5, 25GB) and click on “Change”. You also have a 2GB+ USB stick at hand which can/will be erased.Reboot the Mac and press the Alt key during boot.Select the USB stick in the boot selection menu (choose the EFI option).When prompted, choose “Try ubuntu” and NOT “Install Ubuntu” - once the desktop has loaded, start “Install Linux” from there.IMPORTANT: Once you arrive at the partitioning step, do NOT let Ubuntu repartition your disk. It will boot up in BIOS mode and write a MBR to the disk instead of the necessary EFI files on the first partition Windows will not boot in EFI mode but in BIOS mode instead and crash.Open a terminal and start sudo gdisk /dev/sda (if it’s not installed, reboot into Linux, try again or install with sudo apt-get install gdisk)Type p to view the partition table to verify you’re working on the correct disk. This is because the Linux installation creates a hybrid MBR which is completely unnecessary. Ignore it.After the installation of Linux, Windows 10 will not boot anymore and stop with a blue screen error 0xd000000e. If you did not choose a swap partition, you might get a warning. You have installed one or more additional OS with the above procedure and are able to boot into them by pressing the Alt key during boot Installation of reFind Precondition Do so.Click on System Settings -> Display and set Scale for menu and title bars to 1.50Optional: to fix small fonts of grub during boot, execute sudo grub-mkfont -s 36 -o /boot/grub/DejaVuSansMono.pf2 /usr/share/fonts/truetype/dejavu/DejaVuSansMono.ttfAnd add the following line at the end sudo vi /etc/default/grub: GRUB_FONT=/boot/grub/DejaVuSansMono.pf2To fix freezes with SSD disks edit /etc/default/grub so the line with GRUB_CMD_LINUX reads: GRUB_CMDLINE_LINUX="libata.force=noncq"Install and configure powertop: sudo apt-get install powertop and make it to start automatically: edit /etc/rc.local and insert the line before the one that says exit 0 powertop -auto-tune &Fix keyboard layout (to fix some special characters): sudo su -Echo "options hid-apple iso_layout=0" > /etc/modprobe.d/hid-apple.confYou have a Mac which can boot to OSX, Windows 10 and Linux by pressing the Alt key during boot. You’ll be asked to confirm this action. Note that gdisk won’t confirm a change it’ll just show you a new experts' prompt.Type w to save your changes. Installation of ntfs-3gTo be able to access the shared data partition from all OS, you must install ntfs-3g on OSX and configure it in Linux. (you will have to temporarely disable integrity checks first, refer to “Preparation” and “Cleanup”). If so, boot into OSX by pressing the Alt key during boot and re-install reFind. /refind-install (this is the action which requires the integrity tool to be switched off)During boot you will get a nice boot menu which automatically boots into the previously selected OS after a certain timeout.Note: After Windows or Linux updates you might loose the reFind bootloader. Open a terminal, go to the unzipped refind folder Download and install Open Source ntfs-3g. Download and install OSXFUSE (it’s a pre-condition for ntfs-3g) To make it mount the shared data during boot, add the following line to /etc/fstab (replace the partition number 6 with the correct one and the mount point with the one you like):/dev/sda6 /data ntfs defaults,umask=007,gid=46 0 0
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