I still get 'This copy of install os Catalina application is damaged and can't be used to install mac os' I have tried external/internal drives and usb drives. Mac Pro 2009 with 5,1. New installer and 15.0.33! FIX This Copy of the Install OS X El Capitan Application Can’t be Verified. If the issue is with your Computer or a Laptop you should try using Restoro which can scan the repositories and replace corrupt and missing files. FIX Application is Damaged and Can’t be Used to Install macOS. If the issue is with your Computer or a Laptop you should try using Restoro which can scan the repositories and replace corrupt and missing files. This works in most cases, where the issue is originated due to a system corruption.

  1. This Copy Of Install Macos Is Damaged
  2. This Copy Of Install Macos Is Damaged Full
  3. This Copy Of Install Macos Is Damaged Catalina
  4. This Copy Of Install Macos Is Damaged Pdf

Today I was trying to reinstall an older Mac Mini and installation keep failing with error: “This copy of the Install macOS Sierra.app application is damaged, and can’t be used to install macOS.”

I have tried Yosemite, High Sierra beta (the latest one b6) but still the same error happened so I started wondering why it would fail. One look in the terminal on date and time showed that Mini thought it’s 2001 so package couldn’t be verified and thus installed as verification failed.

So I run following command to set today’s date and time:

date 0818134217

After the date and time were updated to today’s date and installation went on without any problems.

Here is how to use date command:

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NAME
date — display or set date and time

SYNOPSIS
date [-jnu] [[[mm]dd]HH]MM[[cc]yy][.ss]

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So in my case it was:

  • 08 – month
  • 18 – day
  • 13 – hour
  • 42 – minutes
  • 17 – year

This might save you some time.

Getting hold of an ISO is actually more difficult than you might expect. If you have access to a Mac, you won’t be able to download a copy of the OS you already have installed. If the Mac is running macOS Mojave, open the macOS High Sierra page in the App Store and download the installer from there. I have successfully created a macOS Mojave bootable USB from macOS. Then I thought I should back up the partition of the macOS installer and share it with everyone who wants to use it from Windows. I have created two partition image files, the first is Clover Bootloader and the second one is macOS installer. How to Install macOS on Mac from USB Drive (Normal Way) If the target Mac computer already had a macOS or OS X on it, then installing macOS from USB is straightforward and this is called the normal way. Step 1: Insert the macOS bootable USB drive on a USB port of Mac computer. Step 2: Shut down the Mac and wait for 1-2 minutes. Creating a macOS installer on a bootable USB drive provides a convenient way of installing a fresh copy of macOS on. This copy of the Install macOS Mojave.app application is damaged. However, after macOS High Sierra macOS Mojave released. And now its 2019 and comes time to macOS Catalina 10.15. Now suggest you install macOS Catalina on your PCs because like Windows 7 it might not be safe. MacOS Catalina is included many beautiful features than the old version of the macOS operating system.

Experience a new interface designed to deliver more intuitive workflow navigation, improved file browsing, and a new customizable quick access panel.
Work in your preferred aesthetic with Dark Mode support that can automatically detect and match your chosen display preferences.
Enhance your audio files, reduce distracting background noise, adjust the pitch and duration of clips, and get creative with audio effects.
Dive into new AI photo painting, enhanced color selection and layer control, new brushes, and improved rendering.
Explore new ways to add to your zip files; move, update, and replace files more efficiently.
The updated media browser makes it simpler than ever to find, preview, and drag and drop files to your projects.
The searchable help guide makes learning or understanding any workflow more intuitive and flexible than ever.

After successfully created a macOS bootable USB, the next step is how to use it to install macOS from external USB drive. This is not normal case because macOS is very stable and have less bugs/virus than Windows PC. So many Mac users don't know how to perform a clean install of macOS on their Mac when the device was broken or could not boot into desktop.

Please don't worry. We will share detailed steps on how to install macOS/Mac OS X from an USB drive. Even you had issues during this process, it is not thing to be afriad as we have offered the troubleshooting guide as well.

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How to Install macOS on Mac from USB Drive (Normal Way)

If the target Mac computer already had a macOS or OS X on it, then installing macOS from USB is straightforward and this is called the normal way.

Step 1: Insert the macOS bootable USB drive on a USB port of Mac computer.

Step 2: Shut down the Mac and wait for 1-2 minutes. This will make sure the Mac is powered off.

Step 3: Hold the Power and Option key simultaneously for 15 seconds. This will bring up the Startup Manager on Mac.

Step 4: You will see all bootable devices attached to this Mac, including Macintosh HD and external USB or DVD. Click the drive name of your macOS bootable USB to start the installation process.

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Step 5: Agree the terms and conditions and wait for the installation process to be done.

How to Install macOS on Mac from USB Drive (Advanced)

If the drive was not partitioned or the partition table was corrupted, then you can not install macOS on Mac with the normal way. You have to boot Mac into Recovery mode and format the hard drive or SSD to Apple file system first.

Step 1: Shut down your Mac and press the Power key to turn on the Mac; then immediately press Command and R keys.

Step 2: You will be directed to the macOS utility section and here you need to select 'Disk Utility' to format the USB drive. From the Disk Utility app, select Mac drive name under Internal section and then click on the 'Erase' button.

Step 3: You will get a couple of options from the Format. Pleasec choose APFS (macOS) or Mac OS Extended (Journaled) for old version Mac OS X.

Step 4: After the completion of the formatting process, go back to the macOS utility section and this time, select 'Reinstall macOS'.

Step 5: Further, go to the Startup Manager, move to the External drive section, and select your bootable macOS USB drive.

Step 6: Now, the configuration of MacOS will start. As soon as the process starts, it will provide Terms and Agreement page and your job is to agree with the same and then click on the continue button.

Step 7: After that, click on the 'Continue' button to start the installation process. This will take 30-45 minutes and once it gets completed, restart Mac.

Step 8: As you are using the fresh copy of MacOS on Mac machine, so you need to set up the OS and for that connect the Mac with the Wi-Fi and then sign in with the Apple account.

Step 9: After signing in, you can access the several products of Apple such as iCloud, DropBox and many more.

Quick Troubleshooting Tips if You Got Stuck during MacOS Installation

Could not write installation information to disk

If you see the message like 'Could Not Write Installation Information to Disk' when you are trying to install the OS, it means, some important files are missing from the bootable USB device. Mostly, this error happens when you download Mac OS file from an unauthorized site.

You can fix this issue just by downloading the original OS file from the Apple store and then create a fresh bootable USB using the same.

Compatibility error

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Why Does It Say My Macos Mojave Is Damaged

If you are upgrading the OS X after having an older version, you can get the compatibility error message. In such case, just cross-check the system requirement for the OS you want to install on your Mac system.

You can fix this issue just by downloading the original OS file from the Apple store and then create a fresh bootable USB using the same.

macOS could not be installed on your Computer

If you see the error message similar to 'macOS Could Not Be Installed on Your Computer' that means, either your system is not compatible or the Date and Time settings in your system is not up to date..

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To resolve the problem, first, check the system combability for the OS X. If it's fine and still you are facing the error, then just update the system Time & Date with the option of 'Local Apple time server'.

Application is damaged, can't be used to install macOS

You the message 'application is damaged, can't be used to install macOS' appear on your screen, it means the OS certificated has been expired. And so, you won't be able to proceed further for installation.

The simple solution is; you need to create a fresh bootable USB by downloading the MacOS file from its official website.

MacOS couldn't install on this computer

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Sometimes, the thirty-party tool which you use to create a bootable USB is the culprit. If the OS files will not be copied successfully using the bootable tool, then you may see the message like 'MacOS couldn't install on this computer'.

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In this case, you should avoid using a third party bootable tool despite you should create a bootable USB with the help of command.

How To Fix Damaged Macos Mojave

Conclusion

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The above tutorial covers most of the issues you could come across during the installation process. If you had other issues not mentioned in this article, please contact us and our technical team will help you fix it.