Although this subject is being discussed in another thread on this Forum, I'm posting this with a more catchy title since I've found the page that helps to solve the problem. If you're running Mountain Lion 10.8.3 and you've downloaded Google Earth 7, you'll experience crashes whenever you enter a search term. This address leads to a Google page for the Mac that provides downloads for earlier Google Earth versions. For example, I downloaded Google Earth 6.2 (the free version) and it solved my problem. Enter the following link in Safari and you can download the version you want whether it's the free version or the pro version.
http://support.google.com/earth/bin/answ...5&ctx=topicBefore opening the new downloaded app's dmg, you'll have to go to System Preferences and click on the Security & Privacy icon. Then, click on the General button. Unlock the window and click on Anywhere. Re-Lock the icon and then open the Google Earth dmg and install.
I deleted my problem Google Earth app before doing this stuff so I know that procedure works. For me, the new web plugin didn't work, so I left it alone. Then, if you had a more secure setting than Anywhere, go back to the Security and Privacy icon and change your setting back to what you prefer.
This has been a vexing problem for a lot of folks. Have fun and be grateful for the folks at the product forums on Google.com:
http://productforums.google.com/forum/#!category-topic/earth/mac/P6NVKaiZ7Lc
There's a rumor there that a Google Updater will come along and update to version 7, but I don't know anything about that. I thought we had to update manually.