What does happen? Describe in detail. If there is an error message, please quote the exact unedited word-for-word error message.
First off, I made a mistake. It actually won't let me install the latest update. It gets to 100%, then says 'Update Failed', and when I click for more information, and at that point, I'm lost. I'm not that technically astute. I've not had a problem with an update yet, this is the first time. When I go to open LR, it starts the opening process, then stops almost immediately and says it crashed.
I asked you to QUOTE the exact unedited word-for-word error message.
The specific pop up I get says 'Lightroom quit unexpectedlyClick Reopen to open the application again. Click Report to see more detailed information and send a report to Apple.