External PDF Viewer

iTeXMac is designed to allow the use of an external PDF Viewer however there is no clever interaction, iTeXMac just asks the helper to open the required document.

To use an external PDF viewer, you just select the appropriate menu item of the View menu.
Using the alternate key while opening a file is a one shot change of the opening policy. If your default is to use the built in PDF Viewer, it will use the external helper (if any) this time. Conversely, if your default is to use the external helper, it will use the built in PDF Viewer this time. This works only for documents not already opened.

known limitation:
When adobe acrobat is used to render the pdf files, you must close the pdf file before rendering an updated version because acrobat does not update files well. (As iTeXMac does not speak carbon, it cannot send close documents apple event easily...)