Everyone knows that Apple signs the firmware of its mobile system for the iPhone and iPad. But few people know what turns out to be, she signs the macOS desktop system, and if you want to install a version that is no longer signed, you will receive a message with approximately the following content:
Although you can’t fix disk errors on a boot drive, you can verify and repair permissions on any volume that contains a Mac OS X installation (whether it was used to boot your Mac or not). To verify or repair a drive, follow these steps: Access the Applications folder, and then open the Utilities folder. Note: If you are trying to repair your startup disk or startup volume with Disk Utility, you need to restart your computer and hold Command + R to boot into macOS Recovery mode. Then select Disk Utility in the macOS Utilities window and click Continue.If you want to check the Macintosh HD volume in macOS Catalina, please make sure you also check the Macintosh HD - Data volume. Here’s how: Go to Start Menu and open up the Control Panel. Search for ‘ Windows Firewall ’ and open it. On the left-hand side, click ‘ Turn Windows Defender Firewall on or off ’. For other ways to fix a Mac that won't start, check out our guides how to Use OS X boot options to troubleshoot your Mac and how to fix a Mac that won't start. Mac runs slow after installing macOS. There are a number of options to choose from here - you could recover your Mac from your last Time Machine backup, or perform a disk repair - but we recommend choosing the 'Install new OS' option.
“Application is damaged, can’t be used to install macOS”
Here some ways for fix this trouble.
Fix Installation macOS Errors
In this case, you have two solutions:
- download the latest image of the desired system from the Mac App Store and recreate the bootable USB flash drive;
- change the date of your Mac to the one that preceded the release of the build with macOS(OS X).
If the first method requires more time and effort from you, then the second can be done directly in the installer mode without restarting the Mac.
Read more: What is “Copy Error Code 0” Means in macOS?
Fix macOS Installation Errors with Terminal
All that will be needed is to launch the Terminal program and use it to change the date. Change the date a few days before the update is released so that it works. macOS release dates can be viewed on the Wikipedia website.
How to use the Terminal to change the date in the macOS installer:
Mac Os Apple Download
- In the menu bar, click “Utilities” and select Terminal;
- You can view the set date using the command:
![Download Download](/uploads/1/3/3/2/133297648/108511308.jpg)
- In order to change it, you need to add the date to the date command in the format: mmddHHMMyy
mm – month (01-12);
dd – date (01-31);
![Mac os apple download Mac os apple download](/uploads/1/3/3/2/133297648/963142682.png)
HH – hours (00-23);
MM – minutes (00-59);
yy – year.
How To Fix Mac Cant Download Osu
For example, 20:31 on January 9, 2014 will look like this: date 0109203102014
Conclusion
This is not really a panacea, but when I came across a similar problem it helped me reinstall macOS Sierra. After the steps have been taken, you will no longer have an error and you can safely install macOS. You can download and install the latest updates already in the system itself.