Veteran scrum-half Conor Murray has returned home to Ireland midway through Munster's tour of South Africa for personal reasons.
Gavin Coombes crashed over after superb work again from the Munster back to reduce the South Africans’ lead to 21-19 with 12 minutes remaining.
The defending champions trailed by 10 points on two occasions but replacement Eoghan Clarke’s 69th-minute maul try and a late Jack Crowley penalty got the job done.
The 34-year-old ex-Ireland international decided not to continue playing in 2024/25, paving the way for the club to rubber-stamp the arrival of Abrahams, a player whose style of play has drawn comparisons with Cheslin Kolbe.
Munster have been boosted by the return of plenty of international players ahead of their two-match tour of South Africa.
Munster lock RG Snyman is set to make his first appearance for the province this season against the Scarlets at the Parc y Scarlets on Friday in the United Rugby Championship.
Munster have confirmed the signing of winger Diarmuid Kilgallen from Connacht ahead of next season.
Munster player ratings: The men in red have catastrophically fumbled what should have been a routine win against a plucky Northampton Saints side who found a way to win despite being down to 14 men for much of the contest.
Harry Byrne kicked Leinster to a 9-3 festive derby win over Munster at a wet and windy Thomond Park as they returned to the top of the BKT United Rugby Championship.
