BZ2 File Explained: How to Download and Install Mac OS High Sierra with Terminal
How to Install Mac OS High Sierra from a Compressed BZ2 File
Mac OS High Sierra is one of the most popular versions of the Mac operating system, offering improved performance, security, and features. If you want to install or reinstall Mac OS High Sierra on your Mac, you might be wondering how to do it from a compressed BZ2 file. In this article, we will explain what a BZ2 file is, why you might want to use it, how to download Mac OS High Sierra, how to create a bootable installer, and how to install Mac OS High Sierra from the bootable installer. By following these simple steps, you will be able to enjoy the benefits of Mac OS High Sierra on your Mac in no time.
Install Mac Os High Sierra Raw Bz2 Download
What is a BZ2 File and Why Use It?
A BZ2 file is a file that has been compressed by bzip2, a compression program often found on Unix-based systems. BZ2 files always contain only a single compressed file. They are often used for compressing software packages used to install Linux programs. Bzip2 can be used to compress large files into a smaller size for easier storage and distribution. The .BZ2 format can only compress single files, so it's recommended to compile all files into an archive first before compressing with bzip2. Bzip2 is a compression format that is said to be considerably more efficient than many other compression algorithms.
BZ2 File Format and Features
A BZ2 file has the following characteristics:
It has the .bz2 file extension.
It has the magic number BZh at the beginning of the file.
It uses several layers of compression techniques, such as run-length encoding (RLE), Burrows-Wheeler transform (BWT), move-to-front (MTF) transform, and Huffman coding.
It compresses data in blocks between 100 and 900 kB and uses the Burrows-Wheeler transform to convert frequently recurring character sequences into strings of identical letters. The move-to-front transform and Huffman coding are then applied.
It supports multi-threading with the upgraded PBZIP2 file compressor.
Advantages of BZ2 Compression
Some of the advantages of using BZ2 compression are:
It reduces the file size significantly, saving disk space and bandwidth.
It preserves the original quality and integrity of the file, without any loss or corruption.
It is suitable for use in big data applications with cluster computing frameworks like Hadoop and Apache Spark, as the compressed blocks can be independently decompressed.
It is free and open-source, with no licensing or patent issues.
How to Download Mac OS High Sierra
Before you can install Mac OS High Sierra from a compressed BZ2 file, you need to download the macOS installer first. Here are some requirements and recommendations for downloading Mac OS High Sierra:
Requirements and Recommendations Requirements and Recommendations
Before you download Mac OS High Sierra, you should check if your Mac meets the minimum system requirements for the operating system. According to Apple, these are the Mac models that are compatible with macOS High Sierra:
MacBook (Late 2009 or newer)
MacBook Pro (Mid 2010 or newer)
MacBook Air (Late 2010 or newer)
Mac mini (Mid 2010 or newer)
iMac (Late 2009 or newer)
Mac Pro (Mid 2010 or newer)
If your Mac is not on this list, you might be able to install High Sierra on it using a patch, but this is not recommended by Apple and may cause issues with your Mac.
In addition to the compatible Mac model, you also need at least 2 GB of RAM and 20.12 GB of available disk space. You also need an Apple ID and a compatible Internet service provider to access some features of macOS High Sierra.
It is also advisable to back up your Mac before you install macOS High Sierra, in case something goes wrong during the installation process. You can use Time Machine or another backup method to create a copy of your data and settings.
Download Links and Instructions
To download Mac OS High Sierra, you can use the App Store or your browser. The App Store method is faster and easier, but it might require less storage space to download and install the upgrade. The browser method might need more storage space, but it allows you to download a disk image file that you can use to create a bootable installer later.
To use the App Store method, follow these steps:
Launch the App Store app, located in your Applications folder.
Look for macOS High Sierra in the App Store. Here is a link.
This should bring you to the High Sierra section of the App Store, and you can read Apples description of the new OS there.
Click the Get button to begin downloading the macOS installer. The download size is about 7.7 GB.
When the download finishes, the installer will automatically launch. Quit out of the installer when this occurs.
To use the browser method, follow these steps:
Click this link to download a disk image (.dmg) file for macOS High Sierra.
The download size is about 5.4 GB. Wait for it to complete.
Double-click the .dmg file to open it and see the .pkg file within.
Double-click the .pkg file, then follow the onscreen instructions. This will install the macOS installer into your Applications folder.
After you have downloaded Mac OS High Sierra, you can proceed to create a bootable installer for it. How to Create a Bootable Installer for Mac OS High Sierra
Now that you have downloaded Mac OS High Sierra, you need to create a bootable installer for it. A bootable installer is a device, such as a USB flash drive or an external hard drive, that contains the macOS installer and can be used to start up your Mac and install macOS High Sierra on it. Creating a bootable installer is useful if you want to install macOS High Sierra on multiple Macs, or if you want to have a backup of the macOS installer in case you need to reinstall it later.
What You Need to Create a Bootable Installer
To create a bootable installer for Mac OS High Sierra, you need the following:
A Mac that is running macOS High Sierra or later.
The macOS High Sierra installer app, which should be in your Applications folder. If you don't have it, you can download it again from the App Store or the browser method.
A BZ2 file of Mac OS High Sierra, which you can download from this link. The download size is about 4.8 GB.
A USB flash drive or an external hard drive with at least 16 GB of storage space. It will be erased during the process, so make sure you don't have any important data on it.
A decompression tool that can extract BZ2 files, such as The Unarchiver or Keka. You can download them for free from their websites or the App Store.
How to Use Terminal to Create a Bootable Installer
To create a bootable installer for Mac OS High Sierra, you need to use Terminal, a command-line interface that lets you perform various tasks on your Mac. Terminal can be found in your Utilities folder, which is inside your Applications folder. Here are the steps to create a bootable installer using Terminal:
Connect your USB flash drive or external hard drive to your Mac.
Open Terminal and type diskutil list and press Enter. This will show you a list of all the disks and volumes connected to your Mac.
Identify the disk number of your USB flash drive or external hard drive. It should be something like /dev/disk2 or /dev/disk3. Be careful not to choose the wrong disk number, as this could erase your Mac's internal drive or another important drive.
Type diskutil eraseDisk JHFS+ MyVolume diskX and press Enter, where X is the disk number of your USB flash drive or external hard drive. This will erase and format your USB flash drive or external hard drive as a Mac OS Extended (Journaled) volume with the name MyVolume. You can change the name to anything you like, but make sure it has no spaces.
Type bzip2 -d /path/to/macOSHighSierra.bz2 and press Enter, where /path/to/ is the location of the BZ2 file of Mac OS High Sierra on your Mac. This will decompress the BZ2 file and create a .raw file in the same location.
Type sudo dd if=/path/to/macOSHighSierra.raw of=/dev/rdiskX bs=1m and press Enter, where /path/to/ is the location of the .raw file on your Mac and X is the disk number of your USB flash drive or external hard drive. This will copy the .raw file to your USB flash drive or external hard drive and make it bootable. You will be asked to enter your administrator password.
Wait for the process to finish. It may take several minutes or longer depending on the speed of your USB flash drive or external hard drive. When it is done, you will see a message like 12345+0 records in 12345+0 records out 1234567890 bytes transferred in 1234 secs (1234567 bytes/sec).
Type diskutil eject /dev/diskX and press Enter, where X is the disk number of your USB flash drive or external hard drive. This will safely eject your USB flash drive or external hard drive from your Mac.
Congratulations! You have successfully created a bootable installer for Mac OS High Sierra from a compressed BZ2 file. You can now use it to install Mac OS High Sierra on your Mac or another compatible Mac.</ How to Install Mac OS High Sierra from the Bootable Installer
Now that you have created a bootable installer for Mac OS High Sierra, you can use it to install Mac OS High Sierra on your Mac or another compatible Mac. Here are the steps to install Mac OS High Sierra from the bootable installer:
How to Connect the Bootable Installer to Your Mac
To connect the bootable installer to your Mac, follow these steps:
Shut down your Mac.
Plug in your USB flash drive or external hard drive that contains the bootable installer into a USB port on your Mac.
Turn on your Mac and immediately press and hold the Option (Alt) key on your keyboard. Release the key when you see a screen with a list of startup disks.
Select the disk that has the name of your bootable installer, such as MyVolume. It should have an icon that looks like an external drive.
Click the arrow or press Return to start up your Mac from the bootable installer.
How to Start the Installation Process
To start the installation process, follow these steps:
After your Mac starts up from the bootable installer, you will see a window with four options: Restore From Time Machine Backup, Reinstall macOS, Get Help Online, and Disk Utility. Choose Reinstall macOS.
Click Continue and follow the onscreen instructions. You will be asked to agree to the software license agreement and select a destination disk for the installation.
If you want to erase your disk before installing macOS High Sierra, you can use Disk Utility from the window menu bar. This will delete all your data and settings, so make sure you have a backup before you do this.
If you don't want to erase your disk, you can choose to install macOS High Sierra over your existing macOS or OS X version. This will preserve your data and settings, but it might take longer and require more disk space.
Click Install to begin the installation process. Your Mac will restart several times during the process.
How to Follow the Onscreen Instructions and Customize Your Settings
To follow the onscreen instructions and customize your settings, follow these steps:
After the installation process is complete, your Mac will restart and display a welcome screen. Choose your country or region and click Continue.
Select your keyboard layout and click Continue.
If you have an Internet connection, you can choose to transfer your information from another Mac, a Time Machine backup, or a Windows PC. You can also choose not to transfer any information and start fresh. Click Continue and follow the onscreen instructions.
Sign in with your Apple ID and password, or create a new one if you don't have one. You can also choose to skip this step and sign in later. Click Continue and agree to the terms and conditions.
Set up iCloud on your Mac and choose whether to use iCloud Drive, iCloud Photo Library, iCloud Keychain, Find My Mac, and other iCloud features. Click Continue and enter your Apple ID password if prompted.
Create a computer account for yourself by entering your full name, account name, password, and password hint. You can also choose whether to allow your Apple ID to reset your password and whether to set up FileVault encryption for extra security. Click Continue.
Choose whether to enable Siri on your Mac and click Continue.
Select your time zone and click Continue.
Choose whether to send diagnostics and usage data to Apple and app developers and click Continue.
You will see a screen that says Setting Up Your Mac. Wait for it to finish.
Congratulations! You have successfully installed Mac OS High Sierra from a compressed BZ2 file. You can now enjoy the features and benefits of macOS High Sierra on your Mac.
Conclusion and FAQs
In this article, we have shown you how to install Mac OS High Sierra from a compressed BZ2 file. We have explained what a BZ2 file is, why you might want to use it, how to download Mac OS High Sierra, how to create a bootable installer, and how to install Mac OS High Sierra from the bootable installer. By following these simple steps, you will be able to enjoy the benefits of Mac OS High Sierra on your Mac in no time.
Summary of the Main Points and Benefits of Installing Mac OS High Sierra from a BZ2 File
Here are some of the main points and benefits of installing Mac OS High Sierra from a BZ2 file Here are some of the main points and benefits of installing Mac OS High Sierra from a BZ2 file:
A BZ2 file is a file that has been compressed by bzip2, a compression program that can reduce the file size significantly, preserve the original quality and integrity of the file, and support multi-threading and big data applications.
Mac OS High Sierra is one of the most popular versions of the Mac operating system, offering improved performance, security, and features, such as the Apple File System (APFS), Safari 11, Photos app, Siri enhancements, and more.
To install Mac OS High Sierra from a BZ2 file, you need to download the macOS installer app, the BZ2 file of Mac OS High Sierra, and a decompression tool. You also need a USB flash drive or an external hard drive with at least 16 GB of storage space.
To create a bootable installer for Mac OS High Sierra, you need to use Terminal, a command-line interface that lets you perform various tasks on your Mac. You need to erase and format your USB flash drive or external hard drive, decompress the BZ2 file, and copy the .raw file to your USB flash drive or external hard drive using the dd command.
To install Mac OS High Sierra from the bootable installer, you need to connect your USB flash drive or external hard drive to your Mac, start up your Mac from the bootable installer, choose Reinstall macOS from the window, and follow the onscreen instructions. You can also customize your settings and preferences during the installation process.
FAQs
Here are some frequently asked questions about installing Mac OS High Sierra from a compressed BZ2 file:
Question
Answer
What is the difference between a BZ2 file and a ZIP file?
A BZ2 file is a file that has been compressed by bzip2, while a ZIP file is a file that has been compressed by zip. Both are compression formats that can reduce the file size and make it easier to store and distribute. However, BZ2 files can only compress single files, while ZIP files can compress multiple files and folders into one archive. BZ2 files also tend to have higher compression ratios than ZIP files, but they might take longer to compress and decompress.
How can I open a BZ2 file on my Mac?
To open a BZ2 file on your Mac, you need a decompression tool that can extract BZ2 files, such as The Unarchiver or Keka. You can download them for free from their websites or the App Store. After you install them, you can double-click on the BZ2 file and choose which app to use to open it. The app will then extract the contents of the BZ2 file to a folder with the same name as the BZ2 file.
Can I install Mac OS High Sierra from a BZ2 file without creating a bootable installer?
No, you cannot install Mac OS High Sierra from a BZ2 file without creating a bootable installer. The BZ2 file contains a .raw file that is not recognized by your Mac as an executable file. You need to create a bootable installer that contains the macOS installer app and can start up your Mac and install macOS High Sierra on it.
Can I use another compression format instead of BZ2 to create a bootable installer for Mac OS High Sierra?
Yes, you can use another compression format instead of BZ2 to create a bootable installer for Mac OS High Sierra. However, you need to make sure that the compression format is compatible with your decompression tool and that it preserves the .raw file format of Mac OS High Sierra. Some examples of other compression formats are 7z, gz, xz, and rar.
Can I use another command-line tool instead of Terminal to create a bootable installer for Mac OS High Sierra?
Yes, you can use another command-line tool instead of Terminal to create a bootable installer for Mac OS High Sierra. However, you need to make sure that the command-line tool supports the diskutil, bzip2, sudo, dd, and eject commands that are used in Terminal. Some examples of other command-line tools are iTerm2, ZOC, and Hyper.
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