@jrecho
There is a clear step-by-step in Post #1 with the latest fw v4.6 to dl. Follow the tut putting this [Only registered and activated users can see links. ] from roger1109 in the MENA 2013.20 thread onto your CF card with the fw from post #1 here, but only for the GW US model years 2006, 2007 or 2008 which use the CF card. The later models 2009 & 2010 use an SD card and have a different navigation unit - Do not attempt to load the fw from this thread onto the later units.

I'm unsure what you mean by this, maybe you are calling the CF card a 'plugin'?:
I installed the plugin on a mac but everytime I visit the page it asks me to install it again.

I am really confused are we supposed to scan the card using the Garmin software ??
In any case, I suggest you use a windows PC when loading the fw & map onto the CF card. Please read this entire thread, paying very close attention to Post #1. gscott01 has updated the tut and it works well for the 2006-2008 US GWs however the search function using pois is compromised with 'non-official maps' but there are workarounds suggested. If you are still confused, post again with specific details of your problem but only after reading the thread in full. Don't attempt anything until you fully understand what you are doing.