The built-in Storage Management application should allow you to find the item in the Applications panel and you can delete it from there. I personally found right-clicking on the item and selecting Delete to be more responsive than selecting it and using the button. Accessible on Sierra and later by: Apple icon About this Mac; Storage tab. Launch the App Store app and go to the Purchases tab. Find macOS High Sierra and click Install. If that doesn’t work, try deleting the downloaded installer (it’s in your Applications folder) using CleanMyMac and download it again. If you have a copy of macOS Server in your applications folder, that may be the root of the problem.
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.
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.
These installers from the App Store open automatically after you download them:
macOS Catalina 10.15 can upgrade Mojave, High Sierra, Sierra, El Capitan, Yosemite, Mavericks
macOS Mojave 10.14 can upgrade High Sierra, Sierra, El Capitan, Yosemite, Mavericks, Mountain Lion
macOS High Sierra 10.13 can upgrade Sierra, El Capitan, Yosemite, Mavericks, Mountain Lion, Lion
https://premieryellow788.weebly.com/blog/mac-website-design-app. 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.
macOS Sierra 10.12 can upgrade El Capitan, Yosemite, Mavericks, Mountain Lion, or Lion
OS X El Capitan 10.11 can upgrade Yosemite, Mavericks, Mountain Lion, Lion, or Snow Leopard
OS X Yosemite 10.10can upgrade Mavericks, Mountain Lion, Lion, or Snow Leopard
Install macOS
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.
by Shirly Chen, updated on 2017-11-20 to Mac Data Wipe
'Hello, I have a Mac to be sold. I recently upgraded the OS to macOS 10.13 High Sierra. Now, I want to permanently delete some private documents before I sell it to other people? What should I do?'
When you delete a file in macOS 10.13 High Sierra system, the file is not permanently lost even you have securely emptied the trash bin. The deleted file is still on the Mac hard drive. With free Mac data recovery software, anyone can recover the deleted file on the hard drive. Normally, you don’t need to permanently exclude files from your macOS 10.13 High Sierra Mac hard drive. But, before you resell, donate, give away or lend your Mac computer, you’d better permanently delete some files which contain sensitive information of your privacy. Best facebook messenger app mac.
macOS 10.13 High Sierra file eraser
Keep in mind – data recovery software can easily recover all deleted or formatted files under macOS 10.13 High Sierra system. So, you should find the reliable solution to permanently delete your files in macOS 10.13 High Sierra system instead just emptying the trash bin. macOS 10.13 High Sierra system file eraser offers the secure solution to help you permanently delete files in macOS 10.13 High Sierra system. Free download it here:
macOS 10.13 High Sierra system file eraser is the tool which can permanently delete files from Mac hard drive or storage media device under macOS 10.13 High Sierra system. It can delete the targeted files, and overwrite the disk space of the deleted files to prevent data recovery. So, once the files is deleted by macOS 10.13 High Sierra system file eraser, they are lost forever – can’t be recovered by any data recovery software or manual data recovery service.
Think carefully before you run this tool to permanently delete files in macOS 10.13 High Sierra system because the files will be permanently erased.
Step by step: permanently delete files in macOS 10.13 High Sierra system
Step 1: Run macOS 10.13 High Sierra system file eraser on your Mac. Add or drop the files/folders you want to delete. Step 2: Click on 'Erase' button. Then macOS 10.13 High Sierra system file eraser will permanently erase the selected files or folders from your Mac hard drive or storage media device.
macOS 10.13 High Sierra system file eraser also can help you erase entire hard drive to destroy all data on the hard drive or device.
macOS 10.13 High Sierra system can erase the free space of your hard drive to permanently erase the already deleted/formatted data on the hard drive.
How To Delete Apps On Mac Before High Sierra 10.12
macOS 10.13 High Sierra system file eraser is the secure tool to help you permanently delete files under macOS 10.13 High Sierra system, wipe hard drive or erase free disk space. It offers 100% safe data erasure solution and will not shorten the service life of your Mac SSD. If you don’t want to sensitive data falls into the wrong hands, just use this tool to permanently erase your private data before you sell, donate, lend, or give away your Mac/device to other people.
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Permanently and securely erase data from hard drive or external storage device under Mac OS with certified data erasure methods.
How To Delete Apps On Mac Before High Sierra 10.13