Sharks snatch McGuigan from Chiefs
McGuigan (26), also spent time with Glasgow Warriors, New Zealand side Bay of Plenty and South Africa's Border Bulldogs.
Born in Namibia, he has represented Scotland Sevens and can play in number of positions across the backline.
He played for the Chiefs since November 2014.
He went on to make 18 appearances for the Chiefs in all competitions.
"It's a great opportunity for me as it is a club with great ambition," he said.
It was an easy decision for me to come here. It's great to join a club with such drive and determination to succeed."
He is Sale's 10th new signing ahead of the upcoming Premiership season.
"Byron is a great addition to the squad, who'll fit in really well," said Director of Rugby Steve Diamond.
"He'll add to our squad as we aim to get in the Top Four of the Premiership."
