Fix Mbox Mail for Mac with Apple Mail 5, please see this post:
Fix Mbox Mail for Mac on Lion, works Apple Mail 5
After the new Mac OSX Lion released, there has been a number of people finding out the Mbox Mail for Mac doesn’t work at all. **But the fact is, it actually works. **The reason is that the whole new updated Apple Mail 5 has added some security protocols which don’t support the Mbox Mail for Mac. I have been doing some programs hoping to fix this problem. However it takes some time. Therefore herein I would like to introduce an alternative way with Thurderbird to make the whole thing works again.
If you don’t have Mbox Mail for Mac, download and install Mbox Mail for Mac 1.0.2 below and ensure it is not expired and started:
Download and install the beta version of Thurderbird here: