Does anyone know how to lock/password-protect a Dropbox folder for mac? I know you can convert to an image disk (dmg) but it is useless if I travel and use someone else's PC to access my files through dropbox.com.

I'm not sure I understand your question. If you're accessing your files through the web interface, what folder are you trying to protect?

Sorry I wasn't being very clear.

I was talking about the linked Dropbox folder in your Windows Explorer (PC) or Finder (Mac). Whatever you have in there syncs to your cloud Dropbox (essentially dropbox.com, Dropbox's server) in which you can access from anywhere in the world through any computer/tablet/smartphone.

I always have people over and always using my computer almost everyday. I would like that linked folder locked.

Like I said earlier, I did find a way to lock it but only when it is converted into a Disk Image (dmg file). When that dmg file is synced through the cloud Dropbox, it is unusable when I access that file through dropbox.com in someone else's PC. I can however, use that dmg file through any mac (and only mac) in the world BUT, I have to download the entire folder (20+ GBs).

Here is a link to a Mac Forum to that exact problem but it is outdated. You can see my same post as well.

http://forums.macrumors.com/showthread.php?t=1241443

Set up a guest account on your computer for the other people to use. Don't let them log into your account. Problem solved.

Fast User Switching is your friend.

Yeah I think that is the only way (for now). I was doing that but found it SOO annoying switching back and forth constantly. That and it made me seem so annoyingly private and EVERYONE is always asking "what are you trying to hide". lol

Anyways, if I find a way i'll post on here just incase there is some anal person out there like me.

I don't get why you think only the files in that folder are worth protecting. What about your email accounts? Or any other private files.

If your "guests" give you a hard time about having to switch user accounts, tell them to bring their own computer with them.

Honestly, if you were being anal about your privacy, you wouldn't let them use your computer no matter what.

Or, here's a thought - set up a second account on the computer just for your "private" stuff, like DropBox. Then you only switch when YOU need to get to that data.

Lol I just didn't want to be "that guy" with my family and friends.

Every single website/emails/logins is all encrypted with my password (using 1Password program) so no one can access it or see it. The only thing left are my important files in that one dropbox folder. lol

I use espionage to encrypt dropbox folder.
It works sorta well enough for what OP is trying to do.

Yeah, thats good. That will suffice for now. And that way I won't have to keep switching as MUCH. Thanks.

Oh sounds cool, I will have to try it out...

No, your email isn't encrypted; only login info are.
If you use OSX default mail then chances are your email was downloaded to your HDD (or SSD) and can be accessed.

Ohhhh, I see, very good info...

You somehow have a password to prevent your Mail application from launching? How does that work? If they launch your mail app, they're going to see whatever is cached on your local account (if IMAP, everything if POP).

Yes, this is true.
And even if somehow it is password protected using third party password app, the easiest way to find out if it is encrypted is to use spotlight to search your email.