Stellar Susceptibility
A star that is rotating fast enough, or that has enough metallicity, will probably not collapse in a pair-instability supernova due to other effects. Pair-instability happens in low metallicity stars, with low to moderate rotation rates. Stars formed by collision mergers having a metallicity Z between 0.02 and 0.001 may end their lives as pair-instability supernovae if their mass is in the appropriate range.
Very large high metallicity stars are probably unstable due to the Eddington limit, and would tend to shed mass during the formation process.
Read more about this topic: Pair-instability Supernova