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)
I think I have the answer.
Summary
1. Turn off SIP
2. Install High Sierra
3. If you enjoy pain, turn SIP back on.
Detailed steps
1. Restart the computer
2. Immediately hold down CMD+R and release it when the Apple logo appears.
3. Select Utilities | Terminal from the menu bar
4. On the command line type “csrutil disable”
5. On the command line type “reboot”
6. Download and install High Sierra
If you enjoy pain in your nether region, repeat steps one through five, but type “csr enable" in step four. We’ve been running OS X without anything resembling SIP for years and years, so it is probably safe to run without it.
Thank you! This was what I needed. I never considered the computer time would be off, or that it being off would cause the installer to report that the installer is bad, rather than simply updating the machine's time as part of the update.
That did help a little, I deleted the plist file from the prepared usb stick.
On installing i got a new error "the installer payload failed signature check"
So in utillities i opened the terminal and typed ntpdate -u time.apple.com
This sets the internal clock end from there everything went smooth
i got this from the tip in this site
35GB's of available disk space is cutting it too close. Free up storage to at least 50GB's.
I have now 56 GB space. let me try.
same error again - This copy of the Install macOS Sierra.app application is damaged, and can't be used to install macOS.
I have the same issue, but also the App Store thinks that Sierra has already been downloaded and won't let me try again. It doesn't show on the "Purchases" list.
Verify you have your >System Preferences>Date&Time> Set to Automatic
and try again. (If it is already checked then try unchecking.)
delete all previous downloaded copies, and down load again.
Hi
Tried with 50 GB free space but same issue.
Thanks
Vishal
Step 1. Go to your applications folder.
Step 2. Find the installer for macOS Sierra.
Step 3. Right click on the installer and click "Show Package Contents".
Step 4. Click on folder named "Contents".
Step 5. Click on the folder named "SharedSupport".
Step 6. Delete the file named "InstallInfo.plist".
Step 7. Enter your administer password to confirm.
Step 8. Now open the installer.
Thank you.
O... and... I miss Leopard, I miss Steve Jobs era. Apple has become a rotten marketing monster.
Thank you Thubredhal! I've been searching everywhere for this info.
Your welcome!
Now... installer OK, your tip works. But after that macos FAILED TO DOWNLOAD. This is sick. Very sick.
Yeah, spoke too soon. Same problem here.
To update my post, I was able to re-download the update after deleting the damaged installer. I haven't installed it yet, but it appears undamaged.
Mac OS sierra app is damaged
