Mount has had an encouraging pre-season after an injury-plagued time at United but was forced off after just 20 minutes in Sweden with an apparent foot problem.
At that point United were trailing to an early goal from Ibrahim Mbaye and had been stretched on several occasions by the European champions, who were missing many of their star names.
But the standout Amad Diallo shifted the momentum. He won the ball back high up the pitch to tee up Mbeumo for a fine finish for United's equaliser and proved too hot to handle for the PSG defence into the half-time break.
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Mbeumo would have added to his tally had PSG's Matvey Safonov not been in such sharp form, although the goalkeeper left the pitch to jeers after escaping punishment for clattering Joshua Zirkzee way outside of his area.
At the other end, United goalkeeper Tom Heaton suffered a hamstring issue and had to be replaced.
There were late chances for Tyler Fletcher, Shea Lacey and captain Bruno Fernandes - who linked up excitingly with new signing Youri Tielemans. United weren't able to find a winner but boss Michael Carrick will be happy with another positive pre-season workout.
The key moments from Gothenberg...
2: GOAL! Ibrahim Mbaye tucks in the opener at the back post from Dro Fernandez's cross after Ayden Heaven is unable to cut it out.
4: SHOT! PSG threaten again with Khvicha Kvaratskhelia denied from distance by Tom Heaton.
16: BLOCK! Andrey Santos slides in to block Mbaye's shot over the bar with United stretched.
20: INJURY! Mason Mount is forced off injured with an apparent foot injury.
32: GOAL! Amad Diallo wins the ball back high up the pitch and feeds Bryan Mbeumo who cracks an equaliser across goal and into the bottom corner.
36: NO PENALTY! Amad's appeals are waved away when Willian Pacho nudges him as he goes for a header.
38: SAVE! For the second time in the match Mbeumo tests PSG goalkeeper Matvey Safonov with a free-kick shot.
48: INJURY! Heaton injures his right hamstring making a clearance and Dermot Mee comes on in his place.
54: SAVE! Stunning stop from Safonov to deny Mbeumo's shot towards the top corner from outside the box.
72: DRAMA! Safonov rushes out of his box and clatters Zirkzee with his shoulder as United try to counter no foul is given and after Jack Fletcher declines a long-range shot at the unguarded goal, Shea Lacey's effort is blocked behind.
87: CHANCES! Dalot's cross is met by Tyler Fletcher but he twice has efforts blocked before Lacey lashes over from a tight angle
89: CLOSE! Fernandes whips a shot just wide of the far post with a bouncing shot from outside the box.
Man Utd's pre-season so far...
July 18: Man Utd 0-1 Wrexham - Helsinki
July 24: Man Utd 5-0 Rosenborg - Trondheim
August 1: Man Utd 2-1 Atletico Madrid - Stockholm
August 8: PSG 1-1 Man Utd - Gothenburg
August 12: Man Utd vs Leeds - Dublin, 7.30pm
August 15: Man Utd vs AC Milan - Wroclaw, 3.45pm
