Mar 06, 2019 I used my iMac to download High Sierra from the Mac App Store and created a bootable external hard drive to try and reinstall High Sierra. I tried booting from the external HD to begin the install and I get a circle with a cross in it (almost like a stop sign).
You can upgrade to macOS High Sierra from OS X Mountain Lion or later on any of the following Mac models. Your Mac also needs at least 2GB of memory and 14.3GB of available storage space.
MacBook introduced in late 2009 or later
MacBook Air introduced in late 2010 or later
MacBook Pro introduced in mid 2010 or later
Mac mini introduced in mid 2010 or later
iMac introduced in late 2009 or later
Mac Pro introduced in mid 2010 or later
To find your Mac model, memory, storage space, and macOS version, choose About This Mac from the Apple menu . If your Mac isn't compatible with macOS High Sierra, the installer will let you know.
Before installing any upgrade, it’s a good idea to back up your Mac. Time Machine makes it simple, and other backup methods are also available. Learn how to back up your Mac.
It takes time to download and install macOS, so make sure that you have a reliable Internet connection. If you're using a Mac notebook computer, plug it into AC power.
For the strongest security and latest features, find out whether you can upgrade to macOS Catalina, the latest version of the Mac operating system.
If you still need macOS High Sierra, use this App Store link: Get macOS High Sierra.
After downloading, the installer opens automatically.
Click Continue and follow the onscreen instructions. You might find it easiest to begin installation in the evening so that it can complete overnight, if needed.
If the installer asks for permission to install a helper tool, enter the administrator name and password that you use to log in to your Mac, then click Add Helper.
Please allow installation to complete without putting your Mac to sleep or closing its lid. Your Mac might restart, show a progress bar, or show a blank screen several times as it installs both macOS and related updates to your Mac firmware.
macOS 11 Big Sur Update Tips and Problems Fixes
The latest macOS 11 Big Sur is available for users to download now. Like previous versions, upgrading to Big Sur is not always smooth. You may encounter problems like Big Sur download gets stuck, apps won't open or crash often after the update, menu bar icons disappearing, etc. If you have any problem during or after Big Sur update, learn the fixes here:
* How to upgrade your Mac to macOS 11 Big Sur
* macOS 11 Big Sur vs Catalina Review
For Mac users, macOS Sierra surely brought some innovation like Auto Unlock, Optimized Storage, Siri, Universal Clipboard and many more. But the macOS 10.12 upgrading problems are also inevitable. How about macOS High Sierra (10.13)? What you want to see on the latest operating system? The 'Hey Siri' voice activation, handoff for iTunes media, Mac App Store update, better split view management, auto unlock with iPhone not just Apple Watch, Apple Files System or something else? The final release solves all your doubts:
macOS High Sierra Keynotes:
1. Get a boost with new tech. Apple File System (APFS) that speeds up directory cloning with native encryption; HEVC/VR support; Metal 2 that allows apps to unleash the full power of the GPU.
2. Your favorite apps and features get improved. Updates to Safari which help block site trackers and autoplaying videos; let Siri be your personal DJ etc.
3. Edit iPhone's Live Photos in Photos. New photo-editing tools like Curves, for fine-tuning contrast, and Selective Color, for making adjustments to a specific color range., and it has better flitering tools to sort images by keywords and faces.
Also check more about macOS Mojave vs macOS High Sierra >>
You must get inspired with the macOS High Sierra updates, on the other hand, the issues are also noteworthy. This list of High Sierra problems and fixes are shared in case of you update to the new OS, despite of the package download, installation or after installation stuck problems.
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