Sharks hooker Armand van der Merwe set the tone with a try in the opening minute of the match and the home side didn't look back. They ran in five tries to two to claim a maximum five points.
The loss in Durban saw the Highlanders (28 points) begin to lose touch with the New Zealand conference-leader Crusaders (38) and Hurricanes (36) who both won over the weekend.
With co-captain Ben Smith manning the fullback role, and fellow All Black Waisake Naholo on the right wing, Buckman would likely battle Tevita Li for the spot on the left wing or take on a bench role when back to full health.
Buckman spent time across the backline in 2017, with his versatility proving to be an important asset to the team. Now, with Buckman's return looming, coach Aaron Mauger will have some tough decisions facing him.
Ahead of the loss to the Sharks, Mauger confirmed Buckman was likely to be ready to make his season debut before the June break.
"We want to make sure he is 100 per cent at his best, strength-wise, and also mentally around being able to approach the game with full confidence around his neck and shoulder," Mauger said.
"We probably could test him about now, but it's not going to do him any good in the long run."
Li was currently having his own injury issues, flying home from South Africa before the Sharks clash due to an injured foot. He could be back with the squad before long, though, as he was fit to resume running this week.