How-To: Create a macOS Sierra USB Install Disk
Why Ask Different Stack Exchange recommends it
Apple Stack Exchange answerers link it when someone needs a bootable macOS Sierra USB installer to recover from failed installs, format errors or a broken recovery partition.
Recommended by 2 people across 2 different months, 2016 to 2017.
What it is
A short 9to5Mac how-to video showing how to build a bootable USB install drive for macOS Sierra, usable with the developer and public betas and the final release. It walks through the process and points to a full written tutorial on the 9to5Mac site.
What people said
Recommends user216340 · 2016-12 · Ask Different Stack Exchange · on “Info on Recovery Partition Creator”
Yes it is possible. As long as you have a Mac that does work and a USB media drive, that not currently of high importance, that contains 8 GB or more of free storage. First you'll need to download a copy of the OS (El Capitan), you'll do this be going into the Mac App Store and finding it in the purchased tab. If it's not in the purchased tab, then you may need to end up download macOS Sierra (my condolences if you do). You would also want to format your USB (of 8GB or more) in Disk Utility to Mac OS Extended (Journaled) under the GUID Partition Table. Once you have the USB erased and El Capitan downloaded, you can install it to the USB drive. You can do this either using DiskMaker X 5 or Te
Recommends Sayan · 2017-10 · Ask Different Stack Exchange · on “Failed to make bootable USB drive and now I can't even format it”
It happened to me also you simply need to paste this commands in your Terminal, these commands ignores these errors and formats the Disks successfully no need to go to Disk Utility these commands will also create the bootable drive Note: These commands are for macOS Sierra/High Sierra do the changes as per your needs! (This also works for any Previous version of macOS) First you would need to download macOS Sierra Installer(Whichever OS you want), Then you would have to make a bootable disk containing the Install macOS Sierra.app (Whichever OS you want) I am also providing you a link to a YouTube video which will help you in creating the bootable USB stick link: [this video] I am also adding the
Recommends Sayan · 2017-10 · Ask Different Stack Exchange · on “Cannot format "Macintosh HD"”
You are getting this error because a newer version is installed on your mac the same thing happened with me but I was able to find a solution First you would need to download macOS Sierra Installer, now the problem is how to get it right, see if you go to the Purchased tab in the Mac App Store, you can redownload previously purchased macOS versions there (even if they are older than the currently installed one). Then you would have to make a bootable disk containing the Install macOS Sierra.app I am providing you a link to a YouTube video which will help you in creating the bootable USB stick link: [this video] I am also adding the command required to create the bootable disk: sudo (path to the c
Cites Alex · 2016-10 · Ask Different Stack Exchange · on “Can you install OS X from a USB on late 2010 iMac?”
Your iMac late 2010 is compatible with Sierra according to the official MacOS Sierra - Technical Specifications page [LINK] . Mac Hardware Requirements For details about your Mac model, click the Apple icon at the top left of your screen, choose About This Mac, then choose More Info. These Mac models are compatible with macOS 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) You can still get the OS X El Capitan via this link [LINK] - thanks to @user3439894 for pointing out. It's up to you what OS installation to proceed with, but as long as your hardware sup