Hi
I have tried multiple times to download the OS but every time i get message that
This copy of the Install macOS Sierra.app application is damaged, and can't be used to install macOS.
I have validated that i have enough RAM and diskspace when download happens. More than 3 GB RAM and 35 GB disk space is available.
MacBook Pro (Retina, 13-inch, Mid 2014) 2.6 GHz Intel Core i5
Thanks
Vishal
MacBook Pro with Retina display, OS X El Capitan (10.11.6)
If you have reset NVRAM PRAM before the installation, than date and time was been reseted.
Wrong date is one of reason to cancel installation with "This copy of the Install macOS Sierra.app application is damaged, and can't be used to install macOS"
If you are installing macOS using USB, run Terminaland fix System Date using command: date {month}{day}{hour}{minute}{year} <enter>
Example: date 030223592018
Means March, 02, 23:59, 2018
after that select: Install macOS ... again.
It really works for me.
Check the date and time.
STEVE JOBS WOULD HAVE FIRED YOU AGES AGO, GOOD RIDDANCE.....
Bingo.
Bingo.
The fix for me (as others mentioned):
1)Build bootable macOS USB disk
2) Boot to USB
3) Launch Terminal and run "ntpdate -u time.apple.com"
4) Install MacOS
Try to set the date to actual date via terminal. You have to type something like this: date 0712122318 in the [mm][dd]HH]MM[yy] format
The fix for me (as others mentioned):
1)Build bootable macOS USB disk
2) Boot to USB
3) Launch Terminal and run "ntpdate -u time.apple.com"
4) Install MacOS
Mac OS sierra app is damaged
