รับซ่อม Mac บริการทั้งในและนอกสถานที่ ให้คำปรึกษาฟรี ยินดีต้อนรับทุก. This tutorial is for Mac OS that is based on Mac OS versions and successfully working on Windows 10. The Mac OS image is required in order to proceeding further steps (i.e. Mac OS DMG / ISO files) and a USB Pen drive with minimum 8gb size is required.
Sep 06, 2020 • Filed to: Solve Mac Problems • Proven solutions
A Universal Serial Bus or USB Drive, also known as a flash drive is a portable data storage device that includes a memory which includes a USB interface. It is typically removable and much smaller than an optical disc. Any sort of data can be stored in this device. The drives are available in various sizes and as of to date, the 2TB(Tera-Byte) flash drives in terms of storage capacity are the largest ones available in the market.
Today, these drives are one of the most consumed used devices in the world. Thanks to their portable nature, affordability, and compatibility, USB drives are being used to send and receive endless information across a surplus of networks and platforms all around the globe. This small tool has opened the world to a stream of limitless options with respect to storing, transferring, copying data, and much more. One of them includes Booting the Mac from such a device.
Part 1. Reasons for Mac Boot from USB
Booting the Mac from USB in a way gives the power back to the user. The likeliest of the reason for choosing the boot from the USB method is that your Mac won't start which denies the user access to the computer. Using an external source like the USB drive helps the user get around the problem. It provides the user access to the contents of the internal drive, assuming the data is safe and not corrupted. It also helps to repair the Mac disk with Disk Utility and other tools. Here are the top reasons why the user should choose to Boot Mac from USB:
- Allows the user to install a different version of macOS.
- It allows the user to test a new version before you make the decision to upgrade.
- Allows risk-free testing of the Beta version.
- Faster and efficient.
- By installing older versions through USB, it permits certain Apps to run which are not compatible with the latest macOS.
Part 2. Preparations for Booting Mac from USB
To ensure a risk-free procedure certain measure should be taken:
- The user should buy a name-brand flash drive.
- The USB should contain 16-32GB of free space.
- The user should scan the flash drive with some reputable Anti-Virus software.
- The user should check to see what size of ports they have on the Mac. A 12' Mac only contains a single C-Type port.
- Make sure to purchase the C port flash drive to avoid any inconvenience.
- It is advised that the user should go with a USB 3.0 supported drive, with a size of 16GB to ensure a swift transfer of data.
- The USB drive should be formatted with a supported GUID partition.
- It should contain an OS X installer or a usable operating system to work with.
Part 3. How to Create Bootable USB on Mac
There are a few general guidelines that can help get your machine started which are mentioned above, regardless of the OS the user prefers. Here are the methods to create a bootable USB drive on Mac.
Creating a Bootable USB Using Terminal
The terminal is the default gateway to the command line on a Mac. It is just like the Command Prompt feature works for MS Windows. The Terminal feature ensures a hassle-free experience for the Mac user without the conventional pointing and clicking, the user just has to type the commands and the computer does the rest. The user can find Terminal in the Applications > Utility folder or it can be checked in the finder utility.
Using the Terminal feature is the most simple way to create the bootable USB drive. The user just needs to follow one easy step which is renaming the MyVolume portion of the command with the name of the drive. The name of the drive can be changed using the Disk Utility of Mac. Here are the steps required after opening the Terminal feature to create a bootable USB drive.
- Copy and paste the command which is suited for the version of the operating system into the Terminal window.
- The command for MacOS Mojave is as follows:
sudo/Applications/InstallmacOSMojave.app/Contents/Resources/createinstallmedia --volume/Volumes/MyVolume - Press the Return key.
- Enter the password.
- Confirm to erase the USB drive by typing Y followed by the Return key.
- The terminal will erase all the data inside the drive and create the bootable USB drive.
If there is a need to install a different version of the operating system then the user just has to replace the above-underlined command with their desired version of OS. For example, if the user wants to install Mac OS Sierra instead of Mojave then they would have to replace 'Mojave.app' with 'Sierra.app' inside the command line.
Part 4. How to Boot Mac from USB Media
After creating a bootable USB drive, the user simply needs to plug the created drive into the open port on the Mac. Here are the steps to boot Mac from the USB flash drive:
- Power on the system.
- Press and hold the Option (Alt) key on the keyboard when the computer starts.
- Select the USB drive as a startup disk when the option appears.
- The system will start the boot process off the USB drive.
- Install the operating system from the macOS utilities.
- Data can be restored by using the Time-Machine backup option.
Video Tutorial on How to Boot Mac into Recovery Mode
Part 5. How to Recover Data from Unbootable Mac
The Mac becomes unbootable when the BIOS which is a firmware that is used to perform hardware initialization during the booting process fails to recognize the startup process. It usually happens when there is a failed system update, system crash, damaged MBR, or when the drive becomes corrupt.
Recoverit Mac Data Recovery software is the most efficient option to recover all the lost data when Mac becomes unbootable. Developed by Wondershare, Recoverit is one of the most preferred recovery tools in the world. The tool provides an instant preview of what is recovered after a detailed scan. It allows us to connect almost every type of portable device and recover data from them. Data can be restored by performing the recovery and repair process. The process involves the installation of the Recoverit software that offers users the chance to get back the important data that they had lost.
Step 1. Create a Bootable Media
To recover data from an unbootable Mac, you need to create a bootable media first.
- Installation: Please Install Recoverit by clicking on the icon.
- Select an option: For your crashed Mac, please choose the 'Computer Crash Recovery' option.
- Initiate Recovery Process: Click on 'Start' for the recovery process to launch.
- Create Bootable Drive: Select the 'Create USB bootable drive' option and click on 'Create'.
- A pop-up dialogue will appear that will prompt the user to format the USB drive.
- Format the Drive: Click on 'Format' Now.
- Recoverit will show you the process of formatting the USB drive and creating a bootable drive.
- After a while, the bootable drive will be built up. And please follow the guides which Recoverit shows you.
Step 2. Recover Data from Crashed Mac
Here are the following steps required to recover data from an unbootable computer.
1. Select the Location
When you launch Recoverit, you can select a location to scan. In this case, we will be performing data recovery on Mac's internal hard drive (Macintosh HD) instead of any other connected source.
2. Scan the Location
As soon as you would click on the 'Start' button, Recoverit will take the needed steps for data extraction. If you want positive results, then try not to close the application in between.
3. Preview and Recover
When the data recovery process is completed, the application will display the results on the interface. You can go to any category of your choice from here and preview the retrieved content. Make the needed selection and click on the 'Recover' button to save your files to a secure location.
All hope gets lost when the computer becomes unbootable and the data gets deleted. Recoverit recovery software is the most convenient program when it comes to retrieving lost data from the computer.
Boot Mac Usb Linux
Installing the macOS from a USB flash drive gives the user an instant solution when the Mac installer due to some reason refused to work. The method to create a bootable drive is easier than it sounds. Now, you know what to do whenever you want to upgrade your macOS from a bootable external source by following different methods to ensure a safe and hassle-free process. If you lose valuable data when the Mac becomes unbootable then you can easily recover the lost files by using the Recoverit recovery software. Recoverit guarantees data recovery in no time.
What's Wrong with Mac
- Recover Your Mac
- Fix Your Mac
- Delete Your Mac
- Learn Mac Hacks
And while users historically would pop a boot media disk into their DVD or CD drive, many computers no longer come with optical disk drives. As a result, booting from USB media is becoming the standard.
How you start that rescue media can vary depending on the operating system you are using, but there are a few general guidelines that can help get your machine started, regardless of the OS you prefer.
So if your system is unstable, you need to run a diagnostic tool on the hard drive, or you just want to load a Linux desktop just to see what it's all about, let's look at how you start your machine using rescue USB boot media.
Boot Mac From Usb Cd
How to boot a Mac from USB media
Getting your Mac to load from a USB drive is fairly straightforward.
- Insert the USB boot media into an open USB slot.
- Press the Power button to turn on your Mac (or Restart your Mac if it's already on).
- When you hear the startup chime, press and hold the Option key. Holding that key gives you access to OS X's Startup Manager. Once the Startup Manager screen appears, release the Option key. The utility will look for any available drives that include bootable content.
- Using either the pointer or arrow keys on the keyboard, select the USB drive you wish to boot from.
- Once selected, either hit the Return key or double-click your selection. The machine will start to boot from the USB drive.
NOTE: Have multiple USB devices connected to your Mac? Don't worry. The Startup Manager only lists drives that include bootable content.
Boot from USB: Windows
Starting your PC using USB rescue media is not difficult, although it first requires an adjustment in the BIOS (Basic Input Output System). That's because the BIOS settings include the boot sequence the machine follows when starting up. The boot order tells the machine which devices to search for the software needed to launch the computer and the priority each device in that search.
If you're booting from USB media, you must change the BIOS boot order so the USB device is listed first. Otherwise the computer will load from the hard drive as normal.
Start by plugging the thumb drive into a USB port. Then to change the BIOS boot sequence:
- Press the Power button for your computer.
- During the initial startup screen, press ESC, F1, F2, F8 or F10. (Depending on the company that created your version of BIOS, a menu may appear.)
- When you choose to enter BIOS Setup, the setup utility page will appear.
- Using the arrow keys on your keyboard, select the BOOT tab. All of the available system devices will be displayed in order of their boot priority. You can reorder the devices here.
- Move USB to be first in the boot sequence.
NOTE: If you cannot find USB or Removable Devices among the device options, your BIOS may list it under Hard Drive Devices. In that case, you'll need to:- Move Hard Drive Devices to the top
- Expand to show all hard drive device options
- Move USB device to the top of that hard drive list
- Save the change and then exit the BIOS Setup.
- The computer will restart using the new settings, booting from your USB drive.
- Stay alert! Depending on your BIOS, you may be prompted with a message to Press any key to boot from external device and you will only have a few seconds to respond. If you do nothing, your computer will go to the next device in the boot sequence list, which will likely be your hard drive.
In the future, your computer will first check the USB port for boot media when starting up. That won't be a problem, since the BIOS will move to the next device in the boot sequence ... unless you keep the boot media in the USB port. Then the system will launch from that device every time.
Linux USB Boot Process
To boot Ubuntu from USB media, the process is very similar to the Windows instructions above.
- Confirm the BIOS boot sequence lists the USB drive first, or make that change as needed.
- After the USB flash drive is inserted into the USB port, press the Power button for your machine (or Restart if the computer is running).
- The installer boot menu will load, where you will select Run Ubuntu from this USB.
- Ubuntu will launch and you can begin to working in the system – setting preferences, reconfiguring the system as needed, or running any diagnostic tools.
All hope gets lost when the computer becomes unbootable and the data gets deleted. Recoverit recovery software is the most convenient program when it comes to retrieving lost data from the computer.
Boot Mac Usb Linux
Installing the macOS from a USB flash drive gives the user an instant solution when the Mac installer due to some reason refused to work. The method to create a bootable drive is easier than it sounds. Now, you know what to do whenever you want to upgrade your macOS from a bootable external source by following different methods to ensure a safe and hassle-free process. If you lose valuable data when the Mac becomes unbootable then you can easily recover the lost files by using the Recoverit recovery software. Recoverit guarantees data recovery in no time.
What's Wrong with Mac
- Recover Your Mac
- Fix Your Mac
- Delete Your Mac
- Learn Mac Hacks
And while users historically would pop a boot media disk into their DVD or CD drive, many computers no longer come with optical disk drives. As a result, booting from USB media is becoming the standard.
How you start that rescue media can vary depending on the operating system you are using, but there are a few general guidelines that can help get your machine started, regardless of the OS you prefer.
So if your system is unstable, you need to run a diagnostic tool on the hard drive, or you just want to load a Linux desktop just to see what it's all about, let's look at how you start your machine using rescue USB boot media.
Boot Mac From Usb Cd
How to boot a Mac from USB media
Getting your Mac to load from a USB drive is fairly straightforward.
- Insert the USB boot media into an open USB slot.
- Press the Power button to turn on your Mac (or Restart your Mac if it's already on).
- When you hear the startup chime, press and hold the Option key. Holding that key gives you access to OS X's Startup Manager. Once the Startup Manager screen appears, release the Option key. The utility will look for any available drives that include bootable content.
- Using either the pointer or arrow keys on the keyboard, select the USB drive you wish to boot from.
- Once selected, either hit the Return key or double-click your selection. The machine will start to boot from the USB drive.
NOTE: Have multiple USB devices connected to your Mac? Don't worry. The Startup Manager only lists drives that include bootable content.
Boot from USB: Windows
Starting your PC using USB rescue media is not difficult, although it first requires an adjustment in the BIOS (Basic Input Output System). That's because the BIOS settings include the boot sequence the machine follows when starting up. The boot order tells the machine which devices to search for the software needed to launch the computer and the priority each device in that search.
If you're booting from USB media, you must change the BIOS boot order so the USB device is listed first. Otherwise the computer will load from the hard drive as normal.
Start by plugging the thumb drive into a USB port. Then to change the BIOS boot sequence:
- Press the Power button for your computer.
- During the initial startup screen, press ESC, F1, F2, F8 or F10. (Depending on the company that created your version of BIOS, a menu may appear.)
- When you choose to enter BIOS Setup, the setup utility page will appear.
- Using the arrow keys on your keyboard, select the BOOT tab. All of the available system devices will be displayed in order of their boot priority. You can reorder the devices here.
- Move USB to be first in the boot sequence.
NOTE: If you cannot find USB or Removable Devices among the device options, your BIOS may list it under Hard Drive Devices. In that case, you'll need to:- Move Hard Drive Devices to the top
- Expand to show all hard drive device options
- Move USB device to the top of that hard drive list
- Save the change and then exit the BIOS Setup.
- The computer will restart using the new settings, booting from your USB drive.
- Stay alert! Depending on your BIOS, you may be prompted with a message to Press any key to boot from external device and you will only have a few seconds to respond. If you do nothing, your computer will go to the next device in the boot sequence list, which will likely be your hard drive.
In the future, your computer will first check the USB port for boot media when starting up. That won't be a problem, since the BIOS will move to the next device in the boot sequence ... unless you keep the boot media in the USB port. Then the system will launch from that device every time.
Linux USB Boot Process
To boot Ubuntu from USB media, the process is very similar to the Windows instructions above.
- Confirm the BIOS boot sequence lists the USB drive first, or make that change as needed.
- After the USB flash drive is inserted into the USB port, press the Power button for your machine (or Restart if the computer is running).
- The installer boot menu will load, where you will select Run Ubuntu from this USB.
- Ubuntu will launch and you can begin to working in the system – setting preferences, reconfiguring the system as needed, or running any diagnostic tools.
Creating USB boot media
Regardless of the operating system you are using, booting your machine from USB media does not need to be difficult. A general understanding how your system loads can provide the basics needed to understand what is going on when you use boot media.
Creating USB boot media doesn't need to be difficult either, although there are several options to consider.
For Mac users, we recommend visiting Apple's support page on USB boot media. It provides guidance that is specific to the iteration of OS X you are running (i.e. Sierra, High Sierra, Yosemite, etc.) to help you get the boot version you need.
Windows and Linux users might consider Acronis Disk Director 12, which includes an intuitive Boot Media Builder that streamlines the process and offers tremendous flexibility for the type and kind of boot media you can create, including WinPE media.
