My problem is bad, fwd I had install win 7 on my Mac air and after by the wrong way I had install ing dragon boot manager, always when I went to open my Mac air the boot manager rising and not possible bassing g g to windows 7 system. I ask how to relates this problem, do you have ideally to reset the Mac air with out backup. If you have still decided to install MacOS High Sierra on an older Mac, you will need several things before you can start. First of all, get a USB drive with at least of 8 GB of free space and download MacOS High Sierra Patcher. Later, get a copy of MacOS High Sierra, and you are able to start the procedure. If you want to check compatibility before downloading the installer, learn about the minimum requirements for macOS Catalina, Mojave, High Sierra, Sierra, El Capitan, or Yosemite. You can also check compatible operating systems on the product-ID page for MacBook Pro, MacBook Air, MacBook, iMac, Mac mini, or Mac Pro. Prior Mac OS versions will find Security Update 2017-001 Sierra or Security Update 2017-004 El Capitan available in the Updates section of the Mac App Store as well. Users can also choose to download macOS High Sierra 10.13.1 as an independent update package if desired by going to the Apple support website.
System Information User Guide
Download Apple MacOS High Sierra for Mac to get a boost with new technologies in the latest Mac OS update coming fall 2017.
Refer to the manual for your Mac when you need information that’s specific to your model, such as supported connections and expansion information.
Ask Siri. Say something like: “Open About This Mac.” Learn how to ask Siri.
Choose Apple menu > About This Mac.
Click Support.
In the macOS Resources section, click User Manual.
Why Can't My Macbook Air 2017 Download High Sierra 10.12
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Why Can't My Macbook Air 2017 Download High Sierra 10.13
Download MacBook Air Essentials, MacBook Pro Essentials, MacBook Essentials, iMac Essentials, iMac Pro, and Mac mini Essentials from Apple Books.
Get manuals and related documents for MacBook Air, MacBook Pro, MacBook, iMac, iMac Pro, and Mac mini from the Apple Support manuals website.