I got an e-mail yesterday from a user of my blog. I replied to him directly, but since that mail bounced and never got through I hereby put the question and answer here instead, in hope that he (and others) will see it.

Hello there,

I browsed your blog and find DU Meter for PC. Do you know is there any software or widget for checking data usage on Mac?

with regards
[removed]

Thank you for your interest in my blog.

I've looked around and Net Monitor (http://homepage.mac.com/rominar/net.html) seems promising. I haven't got a Mac myself, so I haven't tested this program personally.

I'd be very interested in knowing if it does the job, could you let me know? In such case, I'll put it out there in a blog post for other Mac users to see.

Kind regards,
Christer