By default, your Mac starts up from its built-in hard disk, but a startup disk can be any storage device that contains an operating system compatible with your Mac. For example, if you install macOS on an internal or external drive, your Mac can recognize that drive as a startup disk. You can then follow the steps in this article to start up from it.

May 17, 2017 For Mac users who also need to use a PC at work, home or just with specific applications, there is a solution. Using Boot Camp Assistant, you can install Windows 7 on your Intel-based Mac computer in its own partition. You’ll have a dual-boot system with your Mac OS on one partition and Windows on another. Sep 10, 2013  Bootcamp on Mac OS X Lion, Windows 7 Tutorial. Install Windows 7 on a Mac Using Boot Camp Assistant (Mac OSX 10.8). How to UPGRADE your mac from Os X Lion 10.7.5 to High Sierra - Duration. Jan 02, 2012  This is a guide on how to get Windows 7 installed as a separate partition on an Intel Mac Boot Camp Drivers: Boot Camp 4: http://support.apple.com/kb/DL1637. Can incompatible Macs be 'hacked' or upgraded to run Mac OS X 10.7 'Lion'? Apple formally notes that Mac OS X 10.7 'Lion' is compatible with 'an Intel-based Mac with a Core 2 Duo, i3, i5, i7 or Xeon processor and at least 2 GB of RAM.' It needs to be running Mac OS X 10.6.6 (or higher, 10.6.8 is recommended) 'Snow Leopard' as well. On my previous Mac, I was able to partition my harddrive and run Windows, including games and programs based exclusively for Windows. I attempted to do that with my newer Mac (Late 2011 model), with OS X Lion installed (Windows XP), and I seem to have lost my disc to install the lion drivers on the Windows partition, meaning I can't get internet or use any programs.

Mar 30, 2020 Starting with OS X Lion, Apple did away with DVDs and other media as a method of installing software and switched to a download model instead.Even so, it's still easy to create a USB installation disk for OS X Lion if you want to install Lion on a freshly formatted hard drive, if you're in an emergency booting situation, or if you need to repair your Mac's hard drive. Aug 06, 2011  UPDATE - BLUETOOTH NOT WORKING IN LION: Testing with a VM and not actual Boot Camp but found that the above configuration using Boot Camp drivers from the Snow Leopard 10.6 DVD DOES NOT FUNCTION with the Lion OS X 10.7 initial download and with the mandatory Parallels 6 'sidegrade' to 6.0.12094. https://duckever144.weebly.com/blog/myriad-pro-download-free-mac.

Use Startup Disk preferences

When you use Startup Disk preferences to select a startup disk, your Mac starts up from that disk until you choose a different one.

1. Choose Apple menu  > System Preferences, then click Startup Disk.
2. Click the lock and enter your administrator password.
3. Select your startup disk, then restart your Mac.

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If you see a message that your security settings do not allow this Mac to use an external startup disk, check the External Boot setting in Startup Security Utility.

Use Startup Manager

When you use Startup Manager to select a startup disk, your Mac starts up from that disk once, then returns to using the disk selected in Startup Disk preferences.

1. Press and hold the Option (Alt) key immediately after turning on or restarting your Mac.
2. Release the Option key when you see the Startup Manager window.
   If your Mac is protected by a firmware password, you can release the key when you're asked to enter the password.
3. Select your startup disk, then click the arrow under its icon, or press Return.
   If you press and hold the Control key during this step, your selection is saved in Startup Disk preferences, so it persists until you change it.

If your Mac is using OS X Lion 10.7.3 or later, you can also use this method to start up from your Time Machine backup disk. Startup Manager identifies your Time Machine backup as ”EFI Boot.”

If you can't select your startup disk or start up from it

Check for these possibilities if you can't see your disk in Startup Disk preferences or Startup Manager, or your Mac won't start up from it.

Check for a compatible operating system on the startup disk

Make sure that your startup disk is using a version of macOS that is compatible with your Mac.

To start up from an external disk with macOS Catalina 10.15 or later, the disk must connect via USB-A, USB-C, or Thunderbolt, not FireWire.

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Check startup security settings

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If you're using a Mac that has the Apple T2 Security Chip, check the settings in Startup Security Utility. These settings determine whether your Mac can start up from another disk.

Check for Option ROM firmware

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If you're in Startup Manager and can't see a third-party startup disk, the startup disk could be using Option ROM firmware. To enhance system security, Mac computers with up-to-date software don’t show devices that use Option ROM firmware until you load their firmware. To do that, press Option-Shift-Command-Period while in Startup Manager. If your startup disk appears, do that each time you want to start up from it or from another disk connected to it.

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If you're using a firmware password, the ability to load Option ROM firmware is disabled as an additional security protection.