This has bothered me for a while (since 2007! -- http://www.mail-archive.com/lyx-users@lists.lyx.org/msg60084.html), so I finally decided to do something about it....
On Mac, moving down a paragraph should place the cursor at the end of the current paragraph (unless it's already there, in which case it should move to the end of the next paragraph). The attached patch does this, honoring the "Use Mac-style for cursor moving between words" preference setting, which I've renamed "Use Mac-style cursor movement". In doing this, I changed the preference setting name (mac_like_word_movement to mac_like_cursor_movement) to better reflect its function, and I altered the description of this preference setting in the dialog. (It probably wouldn't hurt if translations for that description didn't get changed.) The only thing I'm not reasonably sure about is the accelerator key in the Preferences dialog (since these don't show up on Mac). I chose "Use M&ac-style ...", since "a" wasn't used as an accelerator elsewhere in the dialog. BH
mac-cursor.diff
Description: Binary data
