Like I said, my ISP does not provide data usage tracking. It's a community-based provider started with federal grant money several decades ago, runs a fiber optic cable to towers around the mountains of western north carolina, which then broadcast a signal to customers' modems. As the equipment fails, the speeds become more erratic, as slow as 0.01 mbps or even slower (if I get 0.1 mbps I'm pretty happy, but it's usually less), to the point of freezing up and needing pages o be refreshed all the time. Already complained to FCC with no response. Pay $35 a month for this nonsense. The organization employs one guy for all of western NC at this point, and feels no responsibility to its customers, as they did not receive continued funding last year so are letting it all fall to pieces. Thanks for the app suggestion, but like I said, I have Mavericks, and the app is for OSX 10.10 and above. Any other ideas?