Macbook Pro has 10.6.8 installed. Want to install Mt Lion. I downloaded Mt Lion from Apple, copied the pkg file to desktop, clicked on it and installed the install package to the App folder. Clicked on install app and got all the way ti install but got the msg application can't be verified .. corrupt, tampered yada yada.
Same thing happened when I tried to install Lion. What's the problem?
MacBook Pro
Macbook Pro 5,5 2009 ish. Install command to create USB boot disk don't work on OS X version 10.6, 10.7 or 10.8!!! I said earlier this MacBook has 10.6.8 installed. I finally took advice from one other person and just installed El Capitan by unpacking the .dmg file for El Cap, running the .pkg file that installs Install file to the Application folder. Double clicked on that install app and it started to install El Cap on the MacBook Pro. Install went perfectly. Then I created a boot USB for El Cap using the commands listed in one reference above. USB was formatted w/o and errors and now I have a USB recovery disk. The sudo cmd doesn't work for anything less than 10.9. Y'all need to update your reference notes to include this restriction.
Macbook Pro 5,5 2009 ish. Install command to create USB boot disk don't work on OS X version 10.6, 10.7 or 10.8!!! I said earlier this MacBook has 10.6.8 installed. I finally took advice from one other person and just installed El Capitan by unpacking the .dmg file for El Cap, running the .pkg file that installs Install file to the Application folder. Double clicked on that install app and it started to install El Cap on the MacBook Pro. Install went perfectly. Then I created a boot USB for El Cap using the commands listed in one reference above. USB was formatted w/o and errors and now I have a USB recovery disk. The sudo cmd doesn't work for anything less than 10.9. Y'all need to update your reference notes to include this restriction.
Hello
Welcome to Apple Support Communities. We understand you're trying to get macOS Mountain Lion installed and the file showed corrupted. Usually something happened with the download or file when this error occurs. We'd recommend trying to download a fresh file from our direct link:
Mac OS X Mountain Lion Installer
You might also try a new location to download the files to. If you've downloaded them to an external drive, that could be the underlying cause. You may need to run a first aid check on your disk.
How to repair a Mac disk with Disk Utility
Take care.
Ron,
We appreciate those additional details. To confirm, which model of MacBook Pro are you using? Is it compatible with OS X El Capitan? This lists the compatible models: OS X El Capitan - Technical Specifications
If your Mac is compatible, then we would recommend following the steps here to create a bootable installer to update your Mac to OS X El Capitan: How to create a bootable installer for macOS
If the Mac is not compatible with this version of macOS, then we would still recommend using the Disk Utility to scan and repair your hard drive to see if OS X Mountain Lion can be redownloaded and installed successfully.
Best regards.
Didn't help with redownload. After the download, I clicked on the Instal..dmg file, it installed application, InstallOSXMountainLion in the application folder. I then double clicked on that install app, continue, agree and then got that message, application can't be verified .. corrupt, tampered yada yada.
So now what?
Ron
Didn't load to an external drive just desktop on good Macbook, then copied download file from desktop to USB and onto other MacBook. Other Mackbook has Snow Leopard and that version of Safari can't get to many sites.
Followed instructions of creating bootable USB, but got error when trying to erase usb, failed to start erase of disk error (-9999,0)
I tried two different USB, Memorex 32 gb and 64 GB Sandisk. Initially formatted USB to GUID partition and Mac Journaled extended. Checking on the error in other groups, your command don't work on OS X version 10.6, 10.7 or 10.8!!! I said earlier this MacBook has 10.6
One more question, On a Mackbook Pro 5,5 (that has 10.6, .7, or .8) can we install ANY version of OS X that is older than El Capitan (10.11)? It seems Apple does NOT keep verification info to install Lion or Mt Lion, forcing the user to only install El Cap. Am I correct?
Disk on both MacBooks check out OK.
On the MacBook Pro where I'm trying to install the OS, MacBook Pro is 5,5 with 4 GB memory.
Thanks for the information, Ron. Were you able to check the compatible of your Mac with the link we provided?
What year is the Mac you're using?
Thanks!
can't install Mt Lion after download. can't verify
