This copy of the install macos high sierra is damaged

1. Why is macOS High Sierra damaged?
2. How do I reinstall macOS High Sierra without losing data?
3. Why is my macOS High Sierra not installing?
4. How do I reinstall High Sierra on my Mac?
5. Can you repair a Mac hard drive?
6. Can I get my Mac repaired for free?
7. How do I fix the damaged App message on Mac?
8. What does it mean when an application is damaged on Mac?
9. Can I repair my Mac myself?
10. How can I check if my Mac is damaged?

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.

Why is my macOS High Sierra not installing?

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 High Sierra on my Mac?

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.

Can you repair a Mac hard drive?

For each disk that you're repairing, start by selecting the last volume on that disk, then click the First Aid button or tab. In this example, the last volume on the disk is Macintosh HD - Data. Click Run to begin checking the selected volume for errors. If there is no Run button, click the Repair Disk button instead.

Can I get my Mac repaired for free?

If your Mac needs more repairs within 90 days due to issues caused during the service, we'll complete the repairs free of charge. We guarantee our service, including replacement parts, for 90 days or the remaining term of your Apple warranty or AppleCare product coverage, whichever is longer.

How do I fix the damaged App message on Mac?

Go to the Applications folder, right-click the app and select "Move to Trash," empty your Trash Can and reinstall the app. Update the app from App Store or its official website. Temporarily bypass security features by right-clicking the app and selecting Open twice. Restart your Mac.

What does it mean when an application is damaged on Mac?

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.

Can I repair my Mac myself?

Parts, tools, and repair manuals are now available for the iMac, Mac mini, and Mac Studio with the M1 series of chips, and the Studio Display, allowing customers to complete do-it-yourself repairs.

How can I check if my Mac is damaged?

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