yes it is en tranfer mode and i says start to download when it comes op wtih cannot read mem 
i han selekt /dev/tty.PL2303-000011FD from the drop down menu 
but ther is also /dev/tty.Si-2 and /dev/tty.Si-1
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Re: stinger
i am runing 10.5 os and use a usb to sub d converter and found at deriver for the converter 
thanks for the fast replay
					thanks for the fast replay
stinger
cannot read mem from stinger i can connet to the dive computer but when i want to download data it says cannot read mem any iders