Wahoo Blue SC with old (non BT 4.0 iMac)

I am trying to repurpose an old imac (mid 2010) as a dedicated trainer computer. I currently use a wahoo blue speed/cadence sensor with iOS. It works on bluetooth 4.0 (which the imac does not have) and ant+. Will I be good to go if I get an ant+ dongle? Other options or should I just abandon this project?

I have an old imac that I used to use my blue sc with via ant+ and worked well. I have it but in a box now as I upgraded from a wheel on to a direct drive.