To get the latest features and maintain the security, stability, compatibility, and performance of your Mac, it's important to keep your software up to date. Apple recommends that you always use the latest macOS that is compatible with your Mac.
Learn how to upgrade to macOS Big Sur, the latest version of macOS.
![]() Check compatibility
If a macOS installer can't be used on your Mac, the installer will let you know. For example, it might say that your Mac doesn't have enough free storage space for the installation, or that the installer is too old to be opened on this version of macOS.
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.
Make a backup
Before installing, 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. Mac photo app stuck in importing.
Download macOS
It takes time to download and install macOS, so make sure that you're plugged into AC power and have a reliable internet connection. https://qshpvqj.weebly.com/blog/how-to-add-app-to-dock-mac.
These installers from the App Store open automatically after you download them:
Your web browser downloads the following older installers as a disk image named InstallOS.dmg or InstallMacOSX.dmg. Open the disk image, then open the .pkg installer inside the disk image. It installs an app named Install [Version Name]. Open that app from your Applications folder to begin installing the operating system.
Install macOS
Macos Sierra Installer App Download
Photos app on mac takes up too much space. Follow the onscreen instructions in the installer. It might be 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.
Learn more
You might also be able to use use macOS Recovery to reinstall the macOS you're using now, upgrade to the latest compatible macOS, or install the macOS that came with your Mac.
Macos High Sierra Installer
Note: A clean install of macOS Sierra on the startup drive completely erases all data on that drive: all your files and documents, including music, movies, pictures, and even apps. So, If you skip this step, you wouldn’t be able to recover your data if something goes wrong. Cannot delete 'Install macOS High Sierra.app', stuck in trash I often use Install Disk Creator to make bootable usb drives to reinstall macos on clients computers. I am trying to delete an installer of macOS High Sierra and it won't leave the trash, says it's in use.
Macos High Sierra App Store
If you cannot delete something because of system file protection of OS X, e.g. check this issue, here’s simple step-through which will allow you to delete stuff in a secure way:
Provided that your OS X is Catalina: Optimum app for macbook.
The point of this all is that you don’t expose other apps to running with disabled file protection while you’re deleting the file.
You delete it securely while in Recovery Mode (no apps are running), and then immediately re-enable file protection afterward. Comments are closed.
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