So, I realize it's two years later but having searched this is apparently the "mouse cursor is invisible when using dark themes on OSX" thread. This is a problem only with dark color themes like, um... "Default".
On OSX, the mouse cursor is set by the application, not the OS, so there is absolutely no way to change the cursor unless KomodoIDE lets me do it. Is there still no way to change this?
I, at least, am using KomodoIDE on Mac (El Capitan). I realize I may be quite alone, and that the number of programmers who prefer a dark background is a vanishingly small market, and the number who use Macs is even smaller, and the number who are willing to pay to use Komodo on top of that may be just me and (at least once upon a time) somebody named kawitt.
(Just to confirm: yes this was never about the insert location caret, but the "insert text" mouse cursor that we get instead of an arrow when hovering the mouse over the text window.)