You can find and store the Google
Earth map files in either Mac or Windows. In both cases you will need to unhide the hidden files. This is approximately where you can find the file directories or search for "unified_cache_leveldb_leveldb2"
In Mac go to User\Library\Caches\Google\Google Earth\unified_cache_leveldb_leveldb2
Cut and Paste all content from this directory and store contents for offline regions.
In Window similar directory somewhere in
Windows is naturally easier to unhide, in Mac:
Step 1: u need to open the Terminal and type the commands:
1 defaults write com.apple.finder AppleShowAllFiles -bool true
That sets the flag to make the hidden files viewable.
Step 2: u need to restart the finder application by ‘killing’ the application:
1 Killall Finder
U should be able to view the hidden files. To revert back to hidding the files again, just follow the steps again but change the word true to false in Step 1.