I have a copy of the ML upgrade which I used on this computer. Now on another mac have SL and want to use this copy. But it won't work - says it is corrupted. Is there anything I can do about this?
Mac OS X (10.6.8)
Sorry. Just reread my above question and realized that it is not clear. I have a copy of the ML upgrade that I have used before, but now want to use the copy on this mac that currently is in SL 10.6.8. When it gets to the point of "Install", it says that it can't be verified and may be corrupted. Thus, my question of is there anything I can do about this.
I tried installing mavericks and i always get "This copy of the Install OS X Mavericks application can't be verified. It may have been corrupted or tampered with during downloading." - https://discussions.apple.com/thread/5473267
Don't think this applies to my situation. I am not downloading from the apple website. I am using a copy I made 1-2 years ago when I downloaded the free upgrade because I was afraid that in the future I might need to use the download again if ever I lost my setup and had to "redo" everything. So now I am in this situation - my mac with SL and wanted to use this copy rather than have to pay for a new download from the app store. And this is a copy of ML, not Mavericks.
Apple let the certificate for older, downloaded installers expire, so trying the date correction may work. If not, go to the App Store Purchases tab and download the installer again.
designer_02 wrote:
Don't think this applies to my situation. I am not downloading from the apple website. I am using a copy I made 1-2 years ago
I think it does apply. Apple has done something with certificates in the past month or two that mean old copies of installers do not work anymore unless you trick them into doing so or re-download the installer so the certificate is dated correctly. I don't think this is just Mavericks, it is any downloaded installer, I just happen to have a link referring to Mavericks.
I did look into the site by Jonathan Mohar which talked about redating the installer. However, I am not very computer savvy and got lost when I read that I was to drop into Terminal from the installer [Utilities>Terminal] and enter the command to set it to today's date. I know how to get to the Terminal, but it confused me when he stated to do this "from the installer". Don't know exactly what he means. Also, don't know what to do re: running a command. When I open Terminal from the Utilities folder, do I just type in the date comment [such as "date 0428161603"] where the cursor is?
Type this where the cursor is.
sudo date 0201010116
Finally figured out how to get to Terminal from the "installer" and did the sudo date thing, but still get a message saying my upgrade is corrupted and unverifiable. So thanks everyone for your helps. I will just not be able to use the copy I have. Was nice to give it a try, though.
Can't upgrade to ML from SN. Have copy of ML downgrade?????
