The Scottish No 1 has missed out on the initial list of 48 exempt players confirmed by the USGA for the season’s third major in June.
However, it will be mission accomplished for MacIntyre if he is still inside the top 60 in the world rankings on 24 May and, failing that, the same requirement on 7 June.
The 24-year-old made the cut on his debut in last year’s event at Winged Foot, where he flew the Saltire along with Connor Syme and amateur Sandy Scott.
MacIntyre, who tied for 12th as a first-timer in The Masters earlier this month, will find out on 10 May if he has secured an exemption for the US PGA Championship at Kiawah Island on 20-23 May.
That’s when the PGA of America will announce special exemptions for the year’s second major, with players in the world’s top 100 all likely to get in the field at the South Carolina venue.
MacIntyre is already guaranteed a spot in The Open at Royal St George’s in July on the back of tying for sixth in his debut in that event at Royal Portrush in 2019.
Ten spots will also be up for grabs at Torrey Pines, where Bryson DeChambeau will be the defending champion, in a three-event qualifying series on the European Tour in May and early June.