The Celtic man played one last time as Scotland slumped to a 3-0 defeat against Belgium in Brussels on Tuesday night.
It brought to an end a season that started way back on July 10 last year when his Hoops side kicked off their Champions League bid against Alashkert in Armenia.
In the 11 months that followed, McGregor racked up 35 league appearances, eight in the two domestic cups, plus 16 in UEFA competitions as his side completed the 'Triple Treble'.
National team commitments added another 10 games to his hectic workload, but the 25-year-old will not be given long to rest up his weary limbs.
Neil Lennon's champions are due back at Lennoxtown for their pre-season preparations in less than a fortnight as the action gets ready to start all over again with next month's European qualifiers.
"I'll try and get a week off, a wee bit of sun before we go back on the 24th," McGregor said on the Scottish FA's Twitter account.
"I'll try to rest up until then and enjoy a well-earned break, which will be good."