![]() ![]() Or use Startup Security Utility to lower the security levelĭuring startup when Medium Security is turned on, your Mac verifies the OS on your startup disk only by making sure that it has been properly signed by Apple (macOS) or Microsoft (Windows). Or click Startup Disk and choose a different startup disk. If your Mac can't connect to the internet, it displays an alert that an internet connection is required.Ĭheck your internet connection, such as by choosing an active network from Wi-Fi status menu in the menu bar. Windows: An alert informs you that you need to install Windows with Boot Camp Assistant. Or click Startup Disk and choose a different startup disk, which your Mac will also attempt to verify. Click Update to open the macOS installer, which you can use to reinstall macOS on the startup disk. MacOS: An alert informs you that a software update is required to use this startup disk. Enter your administrator password, then click Unlock to complete the download. If FileVault is enabled while your Mac is attempting to download updated integrity information, you're asked to enter a password to unlock the disk. This information is unique to your Mac, and it ensures that your Mac starts up from an OS that is trusted by Apple. If the OS is unknown or can't be verified as legitimate, your Mac connects to Apple to download the updated integrity information it needs to verify the OS. This is a level of security previously available only on iOS devices.ĭuring startup, your Mac verifies the integrity of the operating system (OS) on your startup disk to make sure that it's legitimate. Full Securityįull Security is the default setting, offering the highest level of security. Use these settings to make sure that your Mac always starts up from a legitimate, trusted operating system. To remove Windows from your Mac, use Boot Camp Assistant, not any other utility.įor more information about using Windows on your Mac, open Boot Camp Assistant and click the Open Boot Camp Help button.You can also disallow booting from external or removable media to prevent even those who know the firmware password from starting up from such media. MacBook Pro introduced in 2015 or later 3 MacBook Air introduced in 2017 or later 3 If you have one of these Intel-based Mac models using OS X El Capitan or later, you don't need a USB flash drive to install Windows: Restart, then press and hold the Option (or Alt) ⌥ key during startup to switch between Windows and macOS. If you have an external display connected to a Thunderbolt 3 port on your Mac, the display will be blank (black, grey or blue) for up to 2 minutes during installation. If the Boot Camp installer never opens, open the Boot Camp installer manually and use it to complete Boot Camp installation. Follow the onscreen instructions to install Boot Camp and Windows support software (drivers). If your copy of Windows came on a DVD, you may need to create a disk image of that DVD.Īfter Windows installation completes, your Mac starts up in Windows and opens a ”Welcome to the Boot Camp installer” window. If your copy of Windows came on a USB flash drive, or you have a Windows product key and no installation disc, download a Windows 10 disk image from Microsoft. ![]() If installing Windows on your Mac for the first time, this must be a full version of Windows, not an upgrade. 2Īn external USB flash drive with a storage capacity of 16GB or more, unless you're using a Mac that doesn't need a flash drive to install Windows.Ī 64-bit version of Windows 10 Home or Windows 10 Pro on a disk image (ISO) or other installation media. If you have an iMac Pro or Mac Pro with 128GB of memory (RAM) or more, your startup disk needs at least as much free storage space as your Mac has memory. Automatic Windows updates require that much space or more. Your Mac can have as little as 64GB of free storage space, but at least 128GB of free storage space provides the best experience. You will use Boot Camp Assistant to install Windows 10.Ħ4GB or more free storage space on your Mac startup disk: The latest macOS updates, which can include updates to Boot Camp Assistant. IMac introduced in 2012 through to 2020 1 Mac mini introduced in 2012 through to 2018 MacBook Pro introduced in 2012 through to 2020, excluding MacBook Pro (13-inch, M1, 2020) MacBook Air introduced in 2012 through to 2020, excluding MacBook Air (M1, 2020) ![]() MacBook introduced in 2015 through to 2017 ![]() Boot Camp requires a Mac with an Intel processor. ![]()
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