Google Chrome beta: 4.0.295.0
I couldn’t batch delete bookmarks (delete more than one bookmark) using “Bookmark Manager”. In order to sync using xmark, I decided to delete all the bookmarks Chrome imported during installation. Here is how you can delete the bookmark file.
Go to: /Users/youraccount/Library/Application Support/Google/Chrome then rename bookmark to bookmark.mmm and bookmark.bak to bookmark.nnn. Restart Google Chrome.