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Partitioning Mac For Windows

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When there are several partitions on your hard drive, and you need one bigger than the other on a particular drive to handle more data in it, you need to know methods to use to resize partitions on Mac. In this article, we'll talk about effective ways to resize the partition on Mac without losing data.

  • Bonus: How to Recover Data from a Resized Partition?

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1Rules of Resizing Partition for Mac

  • Your exFAT-formatted drive or partition can now be used for both Windows and Mac. Note that using a drive frequently between Windows and Mac could increase the chances of file corruption, so make.
  • To boot Mac OS X, click the Lion partition icon. To choose Windows, click the Windows partition icon. Note that when you turn on or reboot your Mac, it returns to the operating system you last selected in the System Preferences Startup Disk pane.

If you want to resize a partition for your Mac without losing data, there are some rules you need to follow. Ensure you pay attention to these rules for maximum results.

  • The last partition on a drive cannot be increased. However, it can be deleted.

  • When a particular partition is deleted, the space from it is added to the previous partition.

  • Fusion drives can be quickly resized with the version of Mac Utility Disk used for its creation but not with an older one.

  • Before you resize a Mac volume, remember to backup the drive because resizing may need you to delete partitions

  • Trying to use pie charts to resize a volume is quite difficult to achieve. It is better to use optional sizes rather than using pie chart dividers.

  • If you want to increase a particular volume, then the volume next to the affected volume must be deleted to free up more space.


2How to Resize Mac Partition without Losing Data?

Mac Disk Utility is a powerful built-in application in Mac OS that has undergone a series of changes with every major OS update.

Many Mac users have complained that using Mac Disk Utility to resize a Mac Volume is no longer easy. However, being an experienced Mac expert, we feel its interface is user-friendly and easy to use. Apple has come up with a well-arranged Mac Disk Utility interface that will make enlarging/resizing of a Mac Volume to be easy.

Steps to Resize Mac Partition

If you want to know to resize Mac partitions using Mac Disk Utility, follow the steps below to learn to do it.

Step 1. Navigate through your menu and open Mac Disk Utility.

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Step 2. When Mac Disk Utility opens, select the drive you want to resize.

Step 3. Then select Partition on the toolbar to resize the Volume of your choice using the Utility tool. A pie chart will open showing free space and space occupied by each Volume.

Step 4. For a volume to be enlarged, another one has to be deleted. So, choose the Volume you want to delete on the pie chart.

Step 5. Delete the Volume of your choice and tap the minus icon below the pie chart. The pie chart will give you a warning message about what you've done.

Step 6. If you're satisfied, tap Apply or tap Cancel to delete another Volume.

Step 7. Automatically, Mac Disk Utility will add up the freed space to the Volume instead of the deleted one. However, if you want to customize the Volume sizes, you can select the Volume, specify its size then hit Revert/Return. You can create a new Volume in the leftover space.

Step 8. Drag the Pie Chart to adjust the size of each volume. When the Volume is adjusted to the size you desire, click Apply, and that's it.

3 How to Recover Data from a Resized Partition?

AnyRecover for Mac is unique software developed by iMyFone team to help Mac users recover data from their disk. With AnyRecover unique algorithm, you can get back your lost files from a resized Mac partitioneasily.

Key Features

  • Powerful Partition Recovery: Recover all your lost files no matter how they were lost, such as format, resize, accidentally delete, etc.

  • Recover All Kind of Files: AnyRecover is a great software you can use to recover any file type. Whether it is documents, photos or videos, AnyRecover is the right tool for the job

  • Safe: AnyRecover can recover your files safely without overwriting your exiting files.

  • Supports all Mac OS: AnyRecover supports all Mac OS including the latest Mac OS X 10.14

Steps to Use AnyRecover

Step One - Download and Install the Software

Download and install the software for Mac. Then launch the software and select the mode (Lost Partition Recovery) according to what you want to recover.

Step Two - Scan the Path of the File Location

Once you've chosen the recovery mode, set the path of data location where you want to get your lost files and select the file types of the data you want to recover. Click the 'Scan' button to begin the process.

Step Three - Recover Lost Files

Partitioning Mac For Windows 10

Before you recover the files, you'll have to preview them to be sure that you've selected the right files. Then click the Recover button.

Conclusion: Who would have thought that recovering lost files or enlarging Mac partition can be done effortlessly? Well, with AnyRecover for Mac, you can recover all your lost files which are formatted with a 98% recovery success rate. So, when next you're having problems recovering a deleted file, simply go for AnyRecover.

Installing Windows on a Mac should be a piece of cake with Bootcamp, but thatrarely is the case. In fact, I would personally say that Boot Camp Assistantis one of the worst apps that comes with OS X and unlike the rest, it doesn’twork seamlessly.

A few of its drawbacks:

  • It only supports a drive with a single partition.
  • It often throws very obscure error messages with limited detail.
  • It re-downloads 1.6 GB Windows drivers every single time it runs. These areplaced under /Library/Application Support/BootCamp/WindowsSupport.dmg anddeleted and re-downloaded each time Boot Camp Assistant starts processing.

This post did take a lot of work to complie and I did bone my hard drive afew times while trying certain ideas, so please throw out a thanks if ithelped you out :)

Disclaimer: This guide below contains procedures which can potentiallydestroy your partitions and data. I accept no responsibility for such loss soplease proceed at your own risk.

Update (2016-07-20): I have updated this post with further improvementsrelating to downloading of Boot Camp drivers and ensuring that a Hybrid MBR isnot used (which would cause issues when installing Windows).

  • An 8 GB or larger USB stick
  • A copy of the Windows 10 ISO
  • A valid Windows 10 license
  • A downloaded copy of unetbootin
  1. Start Boot Camp Assistant
  2. Select Action / Download Windows Support Software
  3. Choose your Downloads directory, enter your password and then clickSave

This will be the only step that we will use Boot Camp Assistant for.

Formatting Your USB Stick

Attach your USB stick and start Disk Utility, select your USB drive in theleft panel under External, click Erase and set the options as follows(exactly) and click Erase:

Name: FAT32
Format: MS-DOS (FAT)
Scheme: Master Boot Record

Turning Your USB Stick into a Windows Installer

Open unetbootin, enter your password, set the options as follows andclick OK:

Diskimage: checked, set to ISO and browse to your Windows 10 ISO
Type: USB Drive
Drive: Your USB drive (you should only see one entry here)

If you see more than one drive listed, you may confirm which is your USB driveby opening the Terminal and typing:

You’ll see your USB drive in the output and it should look something like this:

Once you have kicked off unetbootin, grab a snack while the Windows ISO iscopied to the USB stick. This process takes around 15 minutes to complete.

Finishing Up

When this has completed, you may right click on the USB stick in Finder,select Rename “FAT32” and rename it as you like (I’ll call mine“WINDOWS 10”).

Finally, copy the WindowsSupport in your Downloads directory tothe Windows 10 USB stick so it’s easy to get to after our installation.

In Disk Utility, select your internal hard drive on the left panel, andclick on Partition.

Click the + button and create a new partition of your desired size for yourWindows installation and name it as you wish (I’ll call mine “BOOTCAMP”). Ensure that the Format is set to MS-DOS (FAT) and click on Apply.

Huge thanks to Rod’s post from the superuser post titledWindows detects GPT disk as MBR in EFI boot. Ms access for mac 2011.

Once you add a FAT32 partition with either Boot Camp Assistant or Disk Utility,your disk is converted into a hybrid GPT / MBR disk which is actually notsupported by newer versions of Windows. In this step, we revert thisadditional change made by Disk Utility by switching back to a pure GPTpartition table.

  1. Dowload the latest version ofGPT fdiskby browsing to the version, then gdisk-binaries and clicking the filewith the *.pkg extension (e.g. gdisk-1.0.1.pkg).
  2. Install GPT fdisk by running the installer you downloaded

  3. Open a Terminal and check the state of your MBR

    If your MBR partition is set to hybrid, please continue with step 4,otherwise if it is set to protective, you may skip the rest of thissection. Simply type q and hit return to exit GPT fdisk.

  4. Type p to view the existing partition table and verify you’re workingon the correct disk

  5. Type x to enter the expert menu

  6. Type n to create a fresh protective MBR

  7. Type w to save your changes and confirm the change when asked

  8. Type q to exit GPT fdisk

  9. Run GPT fdisk to show your disk layout:

    Your partition table should look something like this:

Disconnecting All Devices From USB Ports

This step is critical as I have had rather serious problems during Windowsinstallation when certain external drives are connected.

Unplug everything from your Mac except your keyboard (if wired) and yourbootable Windows USB stick (which we prepared earlier).

If your Mac contains multiple physical drives, you will need to disconnectall disks except the one which you intend to install Windows on or you mayencounter the following error:

Windows could not prepare the computer to boot into the next phase of installation. To install Windows, restart the installation.

Booting From the USB Stick

Ensure that the USB stick containing the Windows installer is inserted andthen restart your Mac while holding down the option (alt) key.

You should now be presented with a list of bootable drives. Select the USBdrive (usually titled “EFI Boot”) to begin installing Windows.

Correcting Your Windows Hard Disk Partition

When you are asked Where do you want to install Windows?, select theWindows partition created earlier (which I called “BOOTCAMP”) and clickDelete.

Next, select the chunk of Unallocated Space and click on New to createa proper Windows NTFS partition.

Note: OS X only supports creation of FAT filesystems, so this is why we needto re-create the partition ourselves during install.

Completing the Installation

Allow the installer to complete and boot into Windows.

Installing Boot Camp Support Software

Once Windows is up and running, install the Boot Camp Support software runningWindowsSupport/BootCamp/Setup.exe on your USB stick.

Note: The installer takes a little while to show up, so please be patient.

You may encounter a known issue whereby the Boot Camp Support Softwareinstaller locks up while installing Realtek audio.

If this occurs, you will need to open Task Manager and kill theRealtekSetup.exe process.

After the installer has completed, answer No when prompted to rebootand install the Realtek drivers manually by running%USERPROFILE%AppDataLocalTempRarSFX0BootCampDriversRealTekRealtekSetup.exe.If you can’t find this file, check any other directories starting withRARSFX under %USERPROFILE%AppDataLocalTemp.

Once complete, reboot Windows.

  • The latest version of SharpKeys
  • The flipflop-windows-sheel binary (see README for a download link)

Mapping Your Mac Keyboard

Install and run SharpKeys and then configure the following mappings tocorrect your Mac keyboard so that it behaves like a regular Windows keyboard:

Function: F13 -> Special: PrtSc
Special: Left Alt => Special: Left Windows
Special: Left Windows => Special: Left Alt
Special: Right Alt => Special: Right Windows
Special: Right Windows => Special: Right Alt

Note: for F13, you’ll need to select Press a key and click F13 on yourkeyboard.

Switching to Natural Scrolling

If you wish to flip scrolling direction to match that on OS X, runFlipWheel.exe and then click on Flip All.

Enabling Num Lock on Boot

Paste the following into a file named Enable NumLock on Boot.reg thenimport this into the registry to enable NumLock when Windows boots up(it doesn’t by default).

Completing Configuration

That’s it, give your machine one last reboot and you’ll have a fully workingWindows 10 installation.

Virtual Mac For Windows Download

Note: I have found Apple’s Magic Mouse to be extremely unreliable usingthe Boot Camp drivers from Apple. As such, I recommend purchasing a Logitech(or similar) mouse for use in Windows. I have no trouble plugging thewireless receiver for my Logitech mouse into one of the USB ports of my wiredApple Keyboard and it’s so tiny that you can’t see it at all.

Removing the Windows Partitions

If you decide to remove Windows, you may find that Disk Utility doesn’t allowyou to delete the two partitions that have been created by the Windowsinstaller.

This happens due to the fact that the first small partition created is of atype called Microsoft Reserved which OS X’s Disk Utility doesn’t support.

The safest way to delete these partitions is through the Windows installer. Sosimply boot from your USB stick as we did before and when you reach theWhere do you want to install Windows? question, you may delete your“BOOTCAMP” partition and the small 16 MB partition of type MSR (Reserved)just above the BOOTCAMP partition.

Once done, simply quit the installer by clicking the X in the top right cornerof each Window and reboot back into OS X.

Removing the Boot Entry

Even though we have removed the Windows partition, a boot entry will still bepresent when holding down option (alt) during boot.

Partitioning Mac Hard Drive For Windows

You may remove these items by running the following in your Terminal: