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Fastboot is a diagnostic tool that is available on most Android devices—Samsung Galaxy phones and tablets are most notable exceptions—that you can boot into to access and modify system images over a USB connection to a computer.
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Nexus devices, as well as those from HTC, Motorola and Sony all support fastboot.
If you regularly flash custom ROMs or carry out other mods and tweaks on your device then it is essential to understand how to use fastboot, since it is a vital tool for recovering from problems. Through fastboot you can flash a new ROM or radio, or re-flash a custom recovery so you can then restore a nandroid backup.
For this reason it is very difficult to brick a device that supports fastboot. So long as the phone shows some sign of life when you press the power button you should be able to connect it to your desktop computer and get it back working again using fastboot.
In this tutorial we'll take a look at how you can set up fastboot, how to use it and some of the things you can do with it. For our guide we were using a Mac—the process is the same for Linux computers. On Windows the commands don't have the ./ prefix required on the other platforms. You also need to install the Windows drivers for your phone or tablet before you connect it via USB. Drivers are not needed on Mac or Linux.
How to install fastboot
Download the Android SDK. There's no need to install it on a Mac or Linux computer, so simply unzip the download and save the folder to a convenient location, such as on your desktop or in the Applications folder.
Open the folder, and then the platform-tools subfolder within it. Here you should see an icon labelled fastboot. This is what we'll be using.
Set up and use fastboot
Fastboot is not an application that runs within your OS, it requires the terminal or command line.
Open a terminal window—on a Mac you can do this from the desktop by going to Go > Utilities > Terminal.
Next you need to change the working directory to the folder which contains the fastboot software. Do this by typing the command cd followed by the full path to the platform-tools folder from your SDK download. We've unzipped the SDK to the desktop so our command would read cd /Users/[username]/Desktop/android-sdk-macosx/platform-tools/.
Your new working directory should now be shown in the terminal window.
Now power down your phone and boot it into fastboot mode. In most cases this will require you to hold the volume down key and power button simultaneously.
If you're on Windows you'll need to locate and install the drivers for your device before you connect it to your PC.
Connect your phone to your computer via a USB cable. Check that the computer can read the phone by typing fastboot devices on Windows or ./fastboot devices on Mac and Linux. After a brief moment the serial number for your device will be displayed. If the device isn't be read it will tell you there are no devices connected and you should reattach it and try again.
You're now ready to use fastboot.
Flash recovery via fastboot
To flash a custom recovery to your Android device you first need to download one.
You can download ClockworkMod recovery from here, or TWRP from here. Make sure you pick one that is compatible with your device.
If necessary unzip the download so that you are left with a .img file. The for ease of use move this .img file into the platform-tools folder.
Now return to the terminal window and type the command ./fastboot flash recovery [filename.img]. Ensure there are no typos in what you have written, then hit Enter. The custom recovery will now be flashed to your device.
Flash a ROM via fastboot
Flashing a ROM is a similar process. Download one (making doubly sure it is compatible with your device) and move it into the platform-tools folders. Don't unzip it this time.
If you want to wipe your device first—recommended for many ROMs, and often essential for recovering from problems—use the command ./fastboot -w.
To flash the ROM type ./fastboot update [rom filename.zip].
Don't interrupt the process until it has been completed. When it is done your phone should reboot. Alternatively type ./fastboot reboot to reboot, or ./fastboot reboot recovery to boot into recovery.
Other fastboot commands you need to know
There are many other things you can do with fastboot.
Unlock the bootloader
Use the command ./fastboot oem unlock (be warned that this will completely wipe your device) and ./fastboot oem lock to relock it again.
Erase system, data and cache
You can wipe various parts of the device with the commands:
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./fastboot erase system
./fastboot erase data
./fastboot erase cache
Flash a kernel
To flash a kernel use the command ./fastboot flash boot [kernel filename.img].
Flash a radio
To flash a new radio use the command ./fastboot flash radio [radio filename.img].
It is well worth familiarising yourself with using fastboot as it can be a vital tool for recovering your phone if you ever brick it, and it is also useful for more advanced tweaks and mods as well. For example, installing the Android L preview direct from Google was something that initially needed to be done through fastboot (although flash able zips have since been produced to make the process even more straightforward).
By default, Mac starts from its built-in hard disk, but a startup disk can be any storage device that contains bootable contents that compatible with your Mac. For example, if you install macOS or Microsoft Windows on a USB drive, your Mac can recognize that drive as a startup disk. This guide provides 2 ways to boot a Mac from a USB flash drive.
Requirement
Starting up your Mac from an external disk requires the following: https://software-db.mystrikingly.com/blog/office-2019-mac-standard.
- Intel-based Mac.
- Bootable USB thumb drive formatted with a GUID partition type and containing an OS X installer or a usable operating system.
Let's see how to boot a Mac from a bootable USB drive and what to do if your Mac doesn't start up from it.
Way 1: Boot Mac from USB Drive using Startup Manager
Getting your Mac to load from a USB drive is fairly straightforward. Use the following steps, you can easily set Mac boot from an external drive in Startup Manager, so it'll only boot from USB that one time.
Step 1: Insert the USB boot media into a USB slot.
Step 2: Turn on your Mac (or Restart your Mac if it's already on).
Step 3: Press and hold the Option key immediately after you see the Apple logo. How to open another bluestacks. 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.
Step 4: 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.
Way 2: Set a Mac Boot from USB Drive using Startup Disk
When you use Startup Disk preferences to set Mac boot from an external drive, so it'll boot from that disk until you choose a different one. Here is how:
Yoink 3 5 7 x 4. Step 1: Go to Apple menu > System Preference, then click Startup Disk.
Step 2: Click the locked icon and then enter your administrator password.
Step 3: Select External drive as the startup disk, then restart your Mac.
What to do if your Mac does not boot from the selected drive
If you see a message prompts that your security settings do not allow this Mac to use an external startup disk, check the External Boot setting in Startup Security Utility, and then allow your Mac to use an external startup disk.
Step 1: Open Startup Security Utility.
Turn on your Mac, then press and hold Command (⌘) + R immediately after you see the Apple logo. Your Mac starts up from macOS Recovery. When you see the macOS utility window, choose Utilities > Startup Security Utility from the menu bar. When you're asked to authenticate, click Enter macOS Password, then choose an administrator account and enter its password.
Step 2: Select 'Allow booting from external media'.
If you want to select an external startup disk before restarting your Mac, quit Startup Security Utility, then choose Apple menu > Startup Disk.
Note: If you're using Boot Camp in a dual-boot Windows/OS X environment, you may be unable to boot negatively into supported versions of Microsoft Windows XP, Windows Vista or Windows 10 operating systems installed on external USB hard drive.
Make sure disk has been formatted with a GUID partition type
Intel-based Macs support starting from an external USB storage device's volume that has been formatted with a GUID partition type. If you wish to boot from the drive, it's important to format the partition as 'GUID Partition Table' rather than either of the other two ahead of time when you use that drive as a bootable drive. Spotify runs slow on mac alex.
Make sure your disk is bootable
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Volumes that aren't bootable and don't contain a copy of a valid operating system aren't listed in Startup Disk or Startup Manager. Make sure the external drive you're trying to start from contains a usable operating system.
