Slooow Mouse?

[benvereen]

I'm playing Penumbra: Collection on a macbook. (I know, right?)
2.26GHz Intel Core 2 Duo
NVIDIA GeForce 9400M
4GB RAM

Is the extra-low mouse sensitivity normal? Even when the sensitivity option is turned to 5, in-game movement is still too slow, but the mouse is way too fast in menus. Quickly selecting items in the inventory screen becomes a problem. Actions like turning cranks feel very awkward and require me to raise my mouse a lot. Movement in general feels sketchy. (Maybe just a quirk of HPL1?) Is this a known problem and is there a fix???

I have the latest patch installed.
I'm using my screen's native resolution. (1280x800)