Palm PalmTM m100 - Manual (Page 153)

Chapter 6 Page 145
5. In the Serial Port drop-down box, select the simulated port that
your computer uses for infrared communication.
Note: See the documentation for your operating system for
instructions on finding the simulated port. This
information is usually located in the Control Panel.
6. Click OK.
Note: If your cradle/cable is connected to a USB port, you can
continue using it while HotSync Manager is configured for
infrared communication. If your cradle/cable is connected
to a serial port, you cannot use your cradle/cable again
until you reconfigure the HotSync Manager to
communicate with the port defined for cradle/cable
synchronization.
To configure HotSync Manager for infrared communication
on a Macintosh:
1. Double-click the HotSync Manager icon in the Palm folder.
2. In the HotSync Controls tab, select Enabled.
3. Click the Serial Port Settings tab.
4. Under Check for handheld connection using, select Local Setup.