First question, which I can answer....Do In need to do this... Answer..No not really...but it is just bugging me that I can't remember how I did it before. So I have an old E-Trex AA powered Venture GPS with latest 5.90 Firmware and End of Week rolloever updated to give correct date. I am doing this on an Apple Mac...but I do have Win XP Win 7 or 10 on laptops and Virtual machines. So, two days ago i had some maps that were too big to upload to the measly memory in the Venture..think it is something like 5mb. I kept getting a "Failed to upload " message and it would not copy the map over. Now Today, after mucking about with BBBike OpenStreetMap map downloads I pulled some maps off that were small area that should upload.....but and now here is the snag. I can't remember what app/ program I used to attempt the upload with yesterday... I thought it was garmin MapInstall..but no ..that refuses to see the Device. I know the USB - Serial connector and driver is working ...i can still acquire and send Tracks/Waypoints to/from the device using "Load My Tracks" app. JaVaWa Device Manager won't see it ...but I am damn sure it did yesterday.... MapSource can see the device on a real machine or on a Virtual machine on the Mac Does any one have any idea how / what software should be able to send maps over to Venture? have been on this now for about 12 hours today ...and that is on top of yesterday ... I have far better newer GPS units, but this little one does its job, and i'd like to just get a map on it again ...just because I do not want this to beat me if nothing else!