Mack Tuna are a lot of fun to catch and since they are a smaller species of tuna, you can use lighter casting or spinning tackle. Spinning tackle is awesome with Mack Tuna. Mackerel Tuna are very strong and long winded swimmers. They put up a fight much bigger than their size and if grew to Bluefin size, would be unstoppable. Mack Tuna grow to about 35-40 lbs.
A great setup is the Shimano Stella SW spinning reel and an Okuma Salina 3 rod. The Shimano Stella SW reel is a fantastic saltwater reel. It has a great line capacity and a fantastic drag system. I would recommend braided line instead of mono for any tuna fishing. You can almost double your line capacity by using Spectre braided line. KastKing makes some really good braided fishing line.