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 till date, the 2TB(Tera-Byte) flash drives in terms of storage capacity are the largest ones available in the market.
Sep 06, 2019 Download the relevant macOS or OS X installer from Apple, then use Terminal to create a USB installer you can boot up from. Or use the OS X installation disc that came with your machine — or buy a new one — to boot up and install OS X on your Mac’s hard drive. Related: How to downgrade from macOS Mojave to macOS High Sierra. Make sure you click “Download” and let it save to your Mac’s hard drive. While that downloads, you can move onto the next section and start getting your external device ready.
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 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 USB method is that your Mac won’t start which denies the user access to the computer. Using from an external source like the USB drive helps the user get around the problem. It provides the user access to 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 adviced 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.
Create a Bootable drive with the help a third party compression software, which is available for free.
Creating a Bootable USB Using Terminal:
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>Utilities 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.
Confirm to erase the USB drive by typing Y followed by the Return key.
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.
Make A Reboot Flash Drive
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.
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 tool 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 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.
First of all, the user is required to download the Recoverit software on Mac system from the official website. Here are the following step required to recover data from an unbootable computer:
Installation: Please Install Recoverit by clicking on the icon.
Select the folder: Select the “Recover from Crash Computer” 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 will appear that will prompt the user to format the USB drive.
Format the Drive: Click on “Format” Now.
The process will start that will create a bootable flash drive.
Recover Data: After the boot is completed, click on the ”View Guide” option to recover data.
Start Recoverit: Launch the Recoverit software again.
Recover Data: Scan the drives for lost data.
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.
Conclusion:
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.
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Apple Mac OS X Lion is now available to general public. The Mac OS X 10.7 Lion is available for installation only from the Mac App Store. This guide will teach you how to create a bootable USB Flash drive of Mac OS X Lion 10.7 and install Lion from USB, rather than downloading it from Mac App Store on each and every Mac computer you own.
Despite of numerous great and awesome features, Mac OSX Lion 10.7 has a big flaw that it is not available in bootable USB or DVD right now. Every time you you want to install OSX Lion on a Mac you will need to download it from Mac App Store all over again. Thanks to the bootable USB method which eliminates the downloading of Mac OS X Lion for each and every device and lets you install Mac OS X Lion on any Mac.
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Note: An official bootable USB of Mac OSX ion 10.7 will be available in August 2011 for $69. Canon mp160 driver mac os x 10.8. This method not only eliminates the wait for the official, it also saves you $40 (Mac App Store version costs $29).
Creating a bootable Mac OS X Lion 10.7 USB Flash drives requires medium level Mac knowledge, however, by following these simple instructions even a beginner should be able to install Mac OS X Lion via USB Flash Drive.
Why make a bootable Lion USB drive?
Reboot Flash Drive Windows 10
You can perform a clean OS X Lion installation with the bootable USB drive
The bootable Lion USB drive becomes a recovery disk with Disk Utility access, access to Time Machine backups, re-installation, and all other Recovery HD partition features
You will have external media to recover and reinstall Lion in the event of total drive failure or some other catastrophe
Download Reboot Mac Os Flash Drive 2020
Required Stuff
Purchase and Download Mac OS X Lion from the App Store
4GB USB Flash drive (8GB recommended)
If you have arranged the above mentioned items, simply follow the detailed guide below to create a bootable Mac OS X Lion 10.7 USB Flash Drive…
Step 1 – Locate the Lion InstallESD.dmg file
Once the Lion downloading is complete, go to the Applications folder and find the Install Mac OS X Lion.app file you just downloaded; Right click on the Install Mac OS X Lion.app file and select Show Package Contents;
Now go to Contents > SharedSupport directory. Locate the file named: InstallESD.dmg and copy it on your desktop.
Mac os hard drive locked partition. Here's how to split your Mac hard drive into multiple partitions or volumes so that you can run more than one OS on your Mac, or divide up your Mac so different users can have their own space. Aug 09, 2017 1. Boot your Mac and hold down ⌘-R (Command –R) to boot from the Recovery HD partition. Open Disk Utility. Select your locked hard drive. Under the File menu, select Unlock “Drive Name” 5. When prompted for a password, enter the password of the authorized account on the drive. I also had an issue with a locked disc when I was in recovery mode. I ended up installing High Serria on a thumb drive, rebooting the mac holding down command, and selected the thumb drive to boot from. From there I was able to erase the mac's hard drive with JOURNALED selected. Exit disc utility and installed High Serria. It's installing now. Jul 18, 2016 This will put you on the OS X version that came from the factory. You can update to El Capitan after if you like. What you are seeing locked there in your second screenshot is the Recovery HD partition, and that is as it should be and not the problem. The problem is you borked the Fusion drive somehow and this will fix it.
Step 2 – Format The USB
Before formatting, If you have any data on your USB drive then save it;
Plug the USB flash drive into your Mac;
Launch Disk Utility from Applications;
Select the plugged USB from the Left pane on the Disk Utility and click on Partition tab;
Select 1 Partition from the Volume Scheme dropdown menu;
Input a name for the USB and Choose Mac OS Extended (Journaled);
Now click on Options button at the bottom. Select GUID Partition Table and click OK. Now click on Apply at the bottom right to start formatting.
Step 3 – Make Mac OS X Lion Bootable USB
Double-click on InstallESD.dmg (that you copied onto your Mac desktop) to mount the Lion disk image (mounted InstallESD.dmg should appear on Disk Utility application and desktop);
Select the plugged USB from the Left pane on the Disk Utility and then go to Restore tab;
Click and drag the IMac OS X Install ESD from the left pane and drop it in the Source field;
Then Click and Drag the USB drive from the left pane and drop it in the Destination field;
Make sure you have chosen the right USB drive, you don’t want to format the wrong drive and then click on Restore button;
This will restore the Lion 10.7 image to the USB Flash drive. Wait for the process to complete.
Step 4 – Boot Mac OS X Lion from USB
Reboot your Mac with the USB drive plugged in.
Hold down the alt/Option key on your keyboard when you hear the OS X start-up sound.
Choose the USB Flash Drive from there to boot.
Now follow the on screen instructions to install OS X Lion.
You can follow the Step 4 to install Lion on other Macs with the bootable USB you just created.