I think Quickbooks is relatively new to Mac. If you use other software to write checks, not all of them in fact very few, can run on a Mac. (eg. I use Checksoft with Quicken. Checksoft does not run on a Mac.) So be careful.
I can easily take a Mac Airbook into the field with me , so I can take a quick look at my images before leaving a site. An Ipad 2 would be even easier to keep tethered while in the field.
Not for check writing that is done at the office, I use QB in the field for generating invoices at the end of a job if I am on the road. I think I will investigate Parallels Desktop (as opposed to bootcamp) and install Windows. Something I did not not realize one could do when I started this conversation. I am slowly coming out of my cave, but the light bothers my eyes!