The 'iMac G5 Sleep Light Updater' updates the firmware on your iMac G5 so that the sleep indicator light is not as bright during the evening. The daytime brightness remains the same.

Note: Once the update has started, do not cancel or interrupt it. The updater takes about one minute to complete. During the update your computer fans will run at full speed, but will return to normal once the update completes.  Your computer will need to be shut down after the update is complete.

Choose 'Update' to start the update process.