Tried to install update to Mountain Lion and get this message: OSXUpdCombo 10-1.8 image data corrupted.
iMac (27-inch, Late 2012), OS X Mountain Lion (10.8.2)
Simply, the installer is corrupted. Download the Combo version of OS X 10.8.3 again > http://support.apple.com/kb/DL1640
This is the one I tried 3 times and still get the same messge. No luck.
I have done this three times and the same message appears.
Try booting into the Safe Mode. Shut down the computer and then power it back up. Immediately after hearing the startup chime, hold down the shift key and continue to hold it until the gray Apple icon and a progress bar appear. The boot up is significantly slower than normal. This will reset some caches, forces a directory check, and disables all startup and login items, among other things. If the system operates normally, there may be 3rd party applications which are causing a problem. Try deleting/disabling the third party applications after a restart. For each disable/delete, you will need to restart if you don't do them all at once. You can download from the Safe Mode.
What are third party applications ?
Usually it is things like anti-virus programs, MacKeeper, and a few others that cause problems. Most of the programs that cause problems are utility type programs. I hope this makes sense.
Tried to install update to Mountain Lion and get this message: OSXUpdCombo 10-1.8 image data corrupted.
