Bootable Usb Mac Os Sierra Dmg
Having the damaged recovery option I am left with installing the OS through a bootable USB. I read apples guides on how to make a bootable installer for Mac OS -us/HT208202. In the guide it says to download Sierra through Apples App Store. This is not possible since my Mac OS Catalina Macbook, through which I am writing this, thinks that I want to downgrade her OS to Sierra. It displays the following error "Update not found: The requested version of macOS is not available". Cool, ****, now I am in deeper trouble.
Bootable Usb Mac Os Sierra Dmg
Since Apple App Store will not allow me to download Sierra I then googled "Sierra Installer" hoping that I could find an installer (that is not an update). This led me to this guide -us/HT201372. The guide provides a link to download Sierra Installer. Though it is called "InstallOS.dmg". This is a huge problem since the Terminal code to make a bootable USB needs the actual application and not the DMG file. In other words the sudo command does not recognize "InstallOS.dmg". Its looking for "Install Mac OS High Sierra.app" and to make it a bootable image on my journaled-formatted USB drive.
When the terminal is finished creating the bootable USB drive, properly eject the USB drive, plug it into a USB port for the Mac you wish to format, press the power button (as you would normally do to turn on your Mac), finally press the Option key. This will give you the choice on where to boot the OS from (the hard drive or the USB drive)...chose the USB. This will lead you to the install window for Mac OS.
Apple removed the macOS 10.12 download page because the installer was broken when trying to create a bootable USB installer. Instead of actually fixing the broken installer which only needed a simple change in one character, they removed the article and link to download it. Apple has known about this issue for almost a year now.
Now that Apple has the macOS 10.11 and 10.12 installers available for download outside of the App Store these installers are now downloaded as a .dmg file. Within this .dmg file is an .pkg "installer" file which will extract the contents & build the actual installer into a full fledged app in the "Applications" folder. Only then can you use the Terminal command line to create the bootable USB installer. Here is the Apple article describing how to download and "install" the 10.12 installer:
I'm glad Apple is starting to allow the macOS installers to be downloaded from outside the App Store, but it would be even nicer if the resulting image/file could be made platform neutral so any OS can be used to create the actual USB installer. Not everyone has another compatible Mac that can actually download the installers from the App Store and not everyone has another Mac to use for creating the bootable USB.
You don't need a bootable installer to upgrade macOS or reinstall macOS, but it can be useful if you want to install macOS on multiple computers without downloading the installer each time, or you're unable to install a compatible macOS from the Finder or macOS Recovery.
Some Mac users like creating a bootable USB install drive for macOS Sierra, which offers for a way to easily update multiple machines, perform clean installs, and to have just as a backup Mac OS Sierra installer should the need arise.
This article states that you need a USB flash drive that is 8 GB or larger. I have noticed that, for the first time that I remember, the official Apple support article on creating a bootable installer states that you need a drive that is at least 12 GB. Does anyone know if this is true, and why that may be?
In answering JohnS on his question you will be assisting me as well for I have a like (circa 2009) iMac with like operating system with the intent of creating a bootable USB thumb drive to format a new drive that I intend to install.
This does not produce an ISO file, just a bootable DVD. Are you sure it actually works? If it does, I guess you could use DiskUtility to produce an ISO from the burned disk. I have had trouble with InstallESD.dmg burned disks not being able to boot.
This article is focused more on the process part of downloading macOS High Sierra 10 on ISO River platform. With the article, the users can easily understand the bootable USB process to install macOS High Sierra 10.13 full installer. Moreover, this is encouraging a new introduction and an updated side of the macOS software.
This is one of the main reasons you should consider making a macOS bootable USB when your device works properly. However, if none of your devices (MacBook, MacBook Air, MacBook Pro, iMac, Mac Pro, or Mac Mini) are not working when you need them the most, you can use a Windows computer to rescue your Apple device. You can use a Windows 11, 10, 8.1, or 7 computer to quickly create a USB bootable installation media to reinstall macOS Ventura, Monterey, Big Sur, or Catalina on your Mac.
Once you have formatted the USB flash drive with a GPT partition, you can use the instructions mentioned above to use TransMac to create a bootable media, but this time skip steps 5 through 10 and continue on step 11.
In the following section, we will share all the steps for creating macOS High Sierra bootable USB. Before getting started with actual steps, make sure the PC or Mac meets the minimal system requirements of High Sierra:
To create a macOS High Sierra bootable USB, you should first download the installation image. It can be a system installation app (Install macOS High Sierra) from App Store or simply a dmg file. Unfortunately, the installation app for macOS High Sierra is not available when I was trying to download it from Mac App store. Hence, we have to download a High Sierra DMG file in advance.
There are few choices available when it comes to create macOS bootable USB on a PC as Windows is unable to handle .dmg file by default. To do this, you need to burn this dmg file to USB in order to make it a bootable device for OS installation. Currently, the most adorable solution is UUByte DMG Editor, a powerful but easy-to-use dmg burning tool that works smoothly on both Windows and Mac.
Creatinstallmedia is a command line utility for creating bootable USB on Mac and it is developed and maintained by Apple. This is the most popular way to create Mac bootable USB on Mac as the whole process can be done within Terminal app, another advanced system app shipped with macOS and OS X. It means this trick works on all Macs no matter it is old or new. However, it takes some time to figure out how command works.
Finally, enter the Mac login password and type Y to start creating Mac OS High Sierra bootable USb from Terminal app. This will first erase the disk and copy installer files to target volume. Once it is done, you will see a message, saying 'Copy completed. done.'
Disk Maker X is a free third-party app dedicated to building a bootable media from macOS installer app. It is a GUI based tool so there is no need to interact with text commands. This is great news for non tech savvy users.
MDS (Mac Deploy Disk) is an attractive system utility for managing and deploying Mac in a simple and quick way. It includes an useful feature for creating macOS bootable installer. And the process is super easy.
Next, click lock icon and enter login password to grant the permission to MDS app. Finally, tick the Create button at the bottom to start creating a bootable Mac volume from High Sierra installer app.
How to check if the USB is recognized a valid macOS install disk by your Mac? From our researching, some of the USB drive is not bootable even there is no error during the creation process and it is easy to check that.
Please connect the Mac OS High Sierra bootable USB to the Mac you want to get High Sierra installed. Restart the Mac and hold the option key during startup. Wait about 20 seconds and you will see macOS Startup Manager utility showing up on the screen. If everything is correct, then you will see a booting drive called Install macOS High Sierra. Click on that drive name and you can start installing High Sierra on this Mac. If not, this means the burning process failed, you need to burn dmg file again with the same or another app.
Creating High Sierra Bootable USB on Mac is much simpler than on a PC because it is backed by Apple. In addition, there are more third-party apps available based on the createinstallmedia command. If you are using Windows PC, then UUByte DMG Editor is currently the best solution for making Mac bootable USB.
Currently, Apple only offers High Serria Installer app from Mac App Store. This means you can only create a bootable macOS USB on Mac. It could be a problem if you are trying to build a hackintosh on Windows PC. You need macOS High Serria this way. Don't worry, we will give you the result in this article.
After the installation .dmg file is downloaded, you need to burn the dmg file to USB in order to make it bootable. For Windows users, please check out this detailed guide for making bootable macOS USB from DMG. For Mac user, please visit this page instead.
As stated earlier, Apple does not offer the full version of High Sierra and it provides only 19MB update file and it is beneficial for you when you have High Sierra. So, to get the same, you will have to go with Mac OS High Sierra Patcher. This tool will fulfil your desire and you can easily access the OS on your Mac machine via this application. Now, follow the steps listed below to create a bootable High Sierra USB drive.
We have list a couple of ways to help you download macOS High Sierra DMG file as well as how to create a bootable USB from it. All of them are still working till the time we are writing this post. And we recommend downloading dmg file as it works on Windows PC and Mac. The rest of methods can be only done on a Mac computer.