I sure can, HUGUETTE. To make your phone visable to your MacBook Airport, follow the steps at http://vz.to/1f8Kzih to enable the personal hotspot and view it's settings. Once it's been turned on, you should be able to see it as an available connection.
Additionally, keep in mind that third party applications may not provide an accurate reading of your data usage. I can't speak for what that application pulls it's data from, so it may be missing some key components or may simply be providing an estimate. The information available at My Verizon http://bit.ly/xB4iTc is the most accurate way to track data usage amounts and times.
Please follow us on Twitter @vzwsupport