Mac bootcamp select os startup

To proceed, you need to divide your Mac's hard drive into a section for macOS and a section for Windows. This process is called partitioning a disk, and requires that you disable FileVault whole-disk encryption provided by Apple :. Decrypting an encrypted drive can take some time, the exact time being determined by how much data is on your disk, the disk size, and your computer's hardware capabilities.

Downloading Windows 10 Education takes some time, depending on the speed of your internet connection. Do not attempt the download on a metered connection, such as a tethered cell phone. Before continuing, make sure a USB drive at least 16 GB is connected to the system, and be aware that the entire contents of that flash drive will be erased.

This step will take some time, depending on your computer's hardware capabilities and your internet connection speed. Make sure your computer remains plugged into an AC outlet during this process. This process will take several minutes to complete. Once the partition is created, your Mac will restart and begin installing Windows You may be prompted several times for your administrator password.

Follow the Windows installation wizard to begin installing Windows. You'll be prompted with several questions about how to configure Windows for your needs. These steps will take some time, depending on your computer's hardware capabilities. Windows will do its final configurations.

*Mac* changing the start up disc

This step will take some time, depending on your computer's hardware capabilities. Make sure your computer remains plugged in to an AC outlet during this process. Once Windows has started may take some time , the Boot Camp installer will walk you through installing Apple's support software.

You have finished installing Windows on your Mac. You have the option to boot to either Windows or macOS when starting your Mac.


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You can also select one operating system for the computer to start by default. This is document bewm in the Knowledge Base. Last modified on Skip to: content search login. Knowledge Base Search. Log in. Options Help Chat with a consultant. Include archived documents.


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Partitioning your system's hard drive with Boot Camp Assistant may erase all your data. Alternatively, you can use Time Machine with an external hard drive to back up your entire Mac computer; for instructions, see Mac Basics: Time Machine backs up your Mac. If you need assistance setting up Time Machine, contact your campus Support Center. Pre-installation notes Notes:. This guide is written for macOS High Sierra, version If your computer cannot run macOS High Sierra version Determine whether your computer can run Windows 10; refer to Apple's System requirements to install Windows on your Mac using Boot Camp.

If you see a "Create a Windows 7 or later install disk" checkbox, your Mac supports this feature. Installation guide Note:.

Choosing an Operating System on a Mac with BootCamp

These instructions are intended strictly as a guide for installing a fully updated bit version of Windows on a macOS High Sierra Perform these steps in order. Step 1: Check for macOS updates Before configuring Boot Camp, it is critical to make sure that your Mac's software is up-to-date, which lessens the risk of encountering problems during installation: In the menu bar, from the Apple menu, click App Store. At the top of the window, click Updates. If there are updates for your computer, in the upper right corner of the window, click Update All.

This process is called partitioning a disk, and requires that you disable FileVault whole-disk encryption provided by Apple : In the menu bar, from the Apple menu, click System Preferences. Click FileVault. The FileVault control panel will open, locked by default. Before you can disable FileVault, it requires you to unlock the control panel to show that you're an administrator on your computer. To do so, click the lock icon.

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Enter your administrator username if required and your password. You'll then be able to click Turn Off FileVault To confirm, click Turn Off Encryption. Step 4: Download Windows 10 Note:. Back up your files if you haven't yet done so. Partitioning your system's hard drive with Boot Camp Assistant may erase all files. This indicates that the kernel cannot load the kernel extension cache, or that it cannot mount the startup disk. This could be due to trying to run an incompatible operating system on your Mac, due to an extension conflict with the enclosure you are trying to boot from, or due to a firmware compatibility problem between the Mac and the enclosure.

We see this quite frequently when trying to boot from a USB 3. We also see this more frequently on Yosemite when a critical kernel extension's code signature is invalid. If your Mac never progresses past the progress indicator below the Apple logo or stalls at the blue screen while booting from the backup volume, there is probably a problem with some of the system files that are called early in the startup process, or macOS is unable to load the correct drivers for your external enclosure at that stage of the startup process.


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Again, try installing macOS directly onto the cloned volume while booted from the Apple Recovery volume to rule out a compatibility problem with the enclosure. This message generally appears when the volume you are trying to boot from is full or nearly full. Occasionally the Startup Disk Preference Pane will issue this error without any useful context.

More often than not, the inability of the Startup Disk Preference Pane to change the startup disk is not actually an indication that the volume will not be bootable, rather it simply means that the Startup Disk Preference Pane cannot change the startup disk selection to that particular volume. We have found a few conditions that will prevent you from making a startup disk selection:. If you boot from an older backup, e. If you boot from a High Sierra backup volume, you'll notice that your APFS-formatted, Mojave-containing Fusion volume is mounted read-only, and you will be unable to set that volume as the startup disk.

The solution in both cases is to use the Startup Manager boot your Mac while holding down the Option key to select an alternate boot disk. Once you have booted your Mac from the newer OS, you will be able to reset the startup disk selection. If you add an APFS volume to your current startup disk's APFS container, the macOS bless facility will be unable to update the container's Preboot volume to include support files for the second partition.

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Multiple, bootable volumes within a single APFS container is a supported configuration, but you can only make the second volume bootable if you boot from some other startup disk for the duration of the cloning procedure. Likewise, you will be unable to change the startup disk selection to the second volume while booted from the first volume. The solution is the same as above — use the Startup Manager boot your Mac while holding down the Option key to temporarily change the startup disk selection, then set the startup disk explicitly to the new startup volume.

Alternatively, you can create a separate partition on your startup disk rather than adding a second volume to the same parent APFS container and make your backup to that separate partition. We have received a handful of reports from macOS Mojave users that attempting to select a Firewire-attached volume as the startup disk yields this same "unable to bless" error. In the cases where USB was an alternative option, selecting the device as the startup disk works fine when connecting the same device to the Mac via USB. Efforts even to install macOS Mojave onto this device fail to produce a bootable volume.

This is a popular enclosure that we've seen great success with, and so far these reports are limited to the MacBook Pro. Catalina: We have received numerous reports of general bootability problems with this device on macOS Catalina. The Samsung T-series devices will not be a suitable backup device for your T2-based Mac if you require that the backup disk is encrypted.

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Knowledge Base ccc5 Help! My clone won't boot! Printer-Friendly Version Product:. Troubleshooting firmware discovery problems When you boot your Mac while holding down the Option key, the Mac Startup Manager will display a list of available startup devices. T2-based Macs disable booting from an external disk by default If you are attempting to boot a Mac with an Apple T2 controller chip e.