What to do when the Mac installation system prompts that the application copy is damaged? What to do when the Mac installation system prompts that the copy is damaged?

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What to do when the Mac installation system prompts that the application copy is damaged? What to do when the Mac installation system prompts that the copy is damaged Time: 2021/11/2 14:32:19 Source: www.pc6.com Author: Xiao Chen I want to comment (0)

When we need to upgrade a lower version of the Mac system or make a USB flash drive to reinstall it when the system has problems, we need to find a usable Mac installation system first. But what if the Mac installation system found prompts that the application copy is damaged? What if the Mac installation system prompts that the copy is damaged? Let's get to know!

　　 The Mac installation system prompts that the application copy is corrupt Solution: (The following solutions need to be disconnected!!!)

　　 "The Mac installation system prompts that the application copy is damaged and cannot be used to install macOS" or "This copy of the install macOS High Sierra application is damaged, and can't be used to install”

　　 Both prompts are caused by the expiration of one of Apple's certificates:

1、 If you need to upgrade the current old system through the original installation image under the normal condition of entering the system (Double click the installation program upgrade in the downloaded system. dmg file and a corrupted error message appears) ， Disconnect the network first!! Then, after manually changing the time in the system settings, double-click the installer to install the system upgrade, The time reference is as follows: (system preference - date and time)

　　 10.10：2015

　　 10.11：2016

　　 10.12：2017

　　 10.13：2018

　　 10.14：2018

　　 10.15：2019

2、 If it is a USB flash drive boot, Disconnect the network first Then enter (for example): date 0101012018.30 in "Utility" - "Terminal" of the installation interface, and press Enter to install normally. (Enter the terminal code according to the system version in your installation disk)

　　 10.10：date 122014102015.30

　　 10.11：date 0201010116

　　 10.12：date 010514102017.30

　　 10.13：date 0101012018.30

　　 10.14：date 0101012018.30

　　 10.15：date 121212122019