This copy of the install macos is damaged high sierra

1. Why is macOS High Sierra damaged?
2. How do I reinstall macOS High Sierra without losing data?
3. How do I fix my High Sierra install?
4. How do I reinstall macOS without disc?
5. Why can't I update my macOS High Sierra?
6. Can my Mac go past High Sierra?
7. Why won t macOS Sierra install?
8. How do I know if my Mac has internal damage?
9. How do you fix app is damaged and can't be opened Mac?
10. How do I fix my High Sierra install?
11. What does it mean if a Mac installer says it is damaged and can't be opened?
12. How can I check if my Mac is damaged?
13. How do I manually install macOS High Sierra?
14. Why can't I install macOS Sierra on my Mac?

Why is macOS High Sierra damaged?

The cause of this error is an expired certificate, and because the certificate is expired, the “Install macOS” app for Mojave, Sierra, and High Sierra will not run. Fortunately, there is a fairly simple solution to the “damaged” installer problem. Below are the download links for the recent versions of macOS.

How do I reinstall macOS High Sierra without losing data?

Reinstalling macOS does not remove data from your Mac. To begin installation, select Reinstall macOS from the utilities window in macOS Recovery, then click Continue and follow the onscreen instructions.

How do I fix my High Sierra install?

Ensure Mac computer has a proper and reliable internet connection. Install macOS Sierra in Safe Mode. Hold Power until your Mac shuts down > Turn your Mac on and hold the Shift key > Release Shift when the Apple logo appears > The Mac shall be booted into the Safe Mode. Then try to install macOS 10.13/10.13.

How do I reinstall macOS without disc?

Choose Apple menu > Shut Down, press and hold the power button until “Loading startup options” appears, select Options, click Continue, then follow the onscreen instructions. In the Recovery app window, select Reinstall for your macOS release, click Continue, then follow the onscreen instructions.

Why can't I update my macOS High Sierra?

Failed to download macOS High Sierra Package

Make sure that your network connection is stable and that you don't have any duplicate package for High Sierra on your system. If you have already tried to download the package before, then you need to go to the Finder and manually delete this package from the system.

Can my Mac go past High Sierra?

If you're running High Sierra (10.13), Sierra (10.12), or El Capitan (10.11), upgrade to macOS Catalina from the App Store. If you're running Lion (10.7) or Mountain Lion (10.8), you will need to upgrade to El Capitan (10.11) first.

Why won t macOS Sierra install?

Some of the most common reasons macOS can't complete the installation include: The path /System/Installation/Packages/OSInstall. mpkg appears to be missing or damaged. Not enough free storage on your Mac.

How do I know if my Mac has internal damage?

Press and hold Option-D at startup to use Apple Diagnostics over the internet.

How do you fix app is damaged and can't be opened Mac?

Open the Apple menu > System Settings. Select Privacy & Security > Developer Tools. Click the ( + ) button and navigate to the folder where the damaged app resides. Select the app and click Open.

How do I fix my High Sierra install?

Ensure Mac computer has a proper and reliable internet connection. Install macOS Sierra in Safe Mode. Hold Power until your Mac shuts down > Turn your Mac on and hold the Shift key > Release Shift when the Apple logo appears > The Mac shall be booted into the Safe Mode. Then try to install macOS 10.13/10.13.

What does it mean if a Mac installer says it is damaged and can't be opened?

If your Mac says the app you're trying to launch has been damaged, this may indicate the app's code has been altered. This may potentially put your system's security and stability at risk. To fix this error, update the problematic app, install the latest macOS update or reinstall the app.

How can I check if my Mac is damaged?

Press and hold Option-D at startup to use Apple Diagnostics over the internet.

How do I manually install macOS High Sierra?

Click the link to open the App Store page for that macOS. In the App Store, click the Get button to begin downloading the macOS installer. After downloading to your Applications folder, the installer opens automatically. Follow the onscreen instructions to install macOS.

Why can't I install macOS Sierra on my Mac?

Some of the most common reasons macOS can't complete the installation include: The path /System/Installation/Packages/OSInstall. mpkg appears to be missing or damaged. Not enough free storage on your Mac.