From Kinnitty village take the road South towards Roscrea. Take the first turn left signposted 'Slieve Bloom Mountains'. Drive 1.1 miles up this road until you reach a white house on your left. Park here and then walk up the track and cross the gate into the forest. The forest road leads directly to the summit. Close to the summit a fence has been erected across the road with 'No Trespassing' signs. Car to car takes about 45 minutes. Most of the walk is in coniferous forest with limited views.
As of Jan 2022, the 'Authorised Personnel Only' sign has been moved to the gate next to the road, but the gate was otherwise unlocked. One might make the assumption that this is to prevent things like illegal dumping or scramblers. There is no signage on the fence near the summit. Linkback: https://mountainviews.ie/summit/1106/comment/15350/