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You set your Mac or Macbook which disk to start up from when more than one startup disk is connected. This works for USB drives including the NinjaStik
![Usb Usb](https://cdn.osxdaily.com/wp-content/uploads/2012/02/format-drive-as-bootable-for-os-x-mt-lion.jpg)
For 2018 to 2020 Macs with the Secure Boot T2 Chip, see the 2020 Macbook Pro Boot from USB instructions.
A “startup disk” is a volume or partition of a drive that contains a bootable operating system.
What is Mac Recovery USB? Just like the functionality of recovery partition, Mac OS recovery USB. This option on boot trick works for quite literally any boot volume, whether it’s an external USB drive of any sort, a Thunderbolt hard drive, boot DVD, CD, the Recovery partition, even in dual-boot environments with other versions of OS X, or a Linux or a Windows partition with Boot Camp, if it’s bootable and connected to the Mac it will be visible at this boot manager.
You can set your Mac to automatically use a specific startup volume, or you can temporarily override this choice at startup.
- From the Apple menu choose System Preferences.
- Click the Startup Disk icon in System Preferences, or choose View > Startup Disk.
- Select your startup disk from the list of available volumes.
The next time you start up or restart your computer, your Mac starts up using the operating system on the selected volume.
Temporarily change your startup disk with Startup Manager
Startup Manager allows you to pick a volume to start from while the computer is starting up.
Use these steps to choose a startup disk with Startup Manager:
- Turn on or restart your Mac.
- Immediately press and hold the Option key. After a few seconds, the Startup Manager appears. If you don’t see the volume you want to use, wait a few moments for Startup Manager to finish scanning connected drives.
- Use your mouse or trackpad, or left and right arrow keys to select the volume you want to use.
- Double-click or press the Return key to start up your Mac from the volume you selected.
If you have an optical drive connected to your computer, you can insert an installation disc to see it in Startup Manager. You can also attach FireWire or USB external hard drives that contain an operating system to add to the list of startup volumes.
Startup Manager automatically adds bootable volumes as you connect them.
Restart in OS X from Boot Camp
Python editor mac. If you have started up your Mac in Windows using Boot Camp, you can use the Boot Camp system tray to switch your startup disk default back to OS X.
- In Windows, click the Boot Camp icon in the system tray.
- From the menu that appears, choose Restart in OS X.
Start from OS X Recovery
You can also start your Mac from OS X Recovery or Internet Recovery if your Mac was manufactured after 2011.
To start your Mac from the Recovery System, use these steps:
- Start up or restart your computer.
- Hold down the Command and R keys on your keyboard until you see the Apple logo appear onscreen.
If you don’t see a volume listed
Why isn t fortnite downloading on my mac. If you don’t see the volume you want to start your computer from, check the following:
- If you’re using an external drive, make sure it’s connected and turned on.
- Make sure you’ve installed an operating system, like OS X or Windows on the drive you’re trying to start from. Volumes that don’t contain a valid operating system aren’t listed in Startup Disk or Startup Manager.
- If you’ve installed an operating system on a drive but it isn’t listed, the volume you’re trying to start from might need repair. If the volume contains OS X, start your computer from OS X Recovery and use Disk Utility to repair the volume, or reinstall OS X on the volume using the Recovery System.
- Depending on the Mac you are using and the version of OS X that is installed, the Recovery System volume (Recovery HD) might not show up in Startup Manager. Press Command-R during startup to start your Mac from the Recovery System.
For 2018 / 2019 Macbook Pro with the Secure Boot T2 Chip, see the 2018 Macbook Pro Boot from USB instructions.
Mavericks is the latest Mac operating system released by Apple. There are a few reasons why you may desire to install Mavericks from a USB Flash drive. Having it on a USB drive can come in really handy if you have to install Mavericks on multiple Mac’s as it means you don’t have to re-download it onto each of your computers.
Also, it’s really handy if your Mac crashes and the only way to get it working again is to reformat and re-install OS X Mavericks. Also, installing from a USB Flash drive is a lot faster than downloading a new copy from the App Store, it’s even faster than installing from a DVD.
The instructions for setting up a USB Flash drive with OS X Mavericks has slightly changed from the instructions of installing OS X Mountain Lion from USB, but don’t worry about that. I’ll walk your through the whole process.
This is not the only method of creating a bootable Mavericks USB, if you are looking for simpler method check out:
#1 – Download OS X Mavericks
First thing you need to do if you haven’t already is download OS X Mavericks. This is a FREE download from Apple. Here’s link to it: OS X Mavericks
#2 – Prepare your USB Flash Drive
First off, you will need a formatted 8 GB Flash drive.
Before we can restore Mavericks onto the USB Flash drive, the drive has to be properly formatted.
To format the USB drive open Disk Utility (located in Applications/Utilities). Now plug the drive in into your Mac.
System Restore Mac Os X
- Select the USB Flash drive from the sidebar in Disk Utility.
- Select the “Erase” tab.
- Make sure the Format is set to Mac OS Extended (Journaled)
- Finally click the Erase tab.
Restore Mac Os X From Usb Drivers
Vlc browser plugin mac. One important note about Step 4, this will erase everything that is currently on your USB drive.
#3 – Show the Hidden BaseSystem.dmg File
Next, we are going to look for a file called BaseSystem.dmg. Unfortunately, it’s a hidden file. To show the hidden files open Terminal (located in Applications/Utilities). Copy and paste the below into Terminal:
Paste this code and press the enter key to show the hidden files & folders:
defaults write com.apple.finder AppleShowAllFiles YES
Finder has to be restarted. Paste this code and press enter:
killall Finder
Restore Mac Os X From Usb Drive Recovery Software
More methods that don’t require using Terminal: How to Show Hidden Files & Folders on Your Mac
#4 – Restore BaseSystem.dmg to USB Drive
Now we need to navigate to the BaseSystem.dmg file that we will be restoring on to the USB drive.
- Go to the Applications folder.
- Right-click “Install OS X Mavericks”.
- Select “Show Package Contents”.
- Navigate through Contents -> SharedSupport
- Double-click (open) InstallESD.dmg
- In the mounted folder that opens we can now see the BaseSystem.dmg files that would normally be hidden.
- Open Disk Utility (located in Applications/Utilities).
- Select the USB drive partition that you want to put the Mavericks installation setup on.
IMPORTANT: Select the automatically created partition of the USB drive not the drive itself (shown in the sidebar). If you select the USB drive instead of the partition you will get this error: Restore Failure – Could not restore – Resource busy
- Select the Restore tab.
- Drag the BaseSystem.dmg file into the “Source” field.
- Drag the USB partition into the destination.
- Click the Restore button.
#5 – Delete Packages shortcut and paste Packages folder
There is one finally step we need to complete in order to turn the USB into a fully useable method of installing Mavericks.
- Open the USB drive.
- Navigate to System -> Installation
- Now there is a shortcut file called Packages.
- Delete Packages Shortcut file.
- We need to remove this file because it’s simply a shortcut file to the folder that actually stores the files we need. We are going to replace this file with the actual folder that it links to.
- Open the mounted OS X Install ESD folder (the same folder the BaseSystem.dmg file was located).
- Copy the “Packages” folder to the folder we just deleted the Packages shortcut file from.
Congratulations you just created a working Mavericks install USB drive!
Now there are two ways of booting into the USB.
Choose one method:
How To Restore Mac Os X
1. Open System Preferences -> Startup Disk -> Select the USB drive -> Click the “Restart” button.
OR
2. While your Mac is restarting hold down the “alt” key on the keyboard and select the USB drive.