There was Ardi‘s Executor, but I don’t think there was an IRIX port. You could port Executor yourself now, it was open sourced some years ago: https://github.com/ctm/executor
In addition, there is a port of the Basilisk II emulator (this requires a copy of the original Mac ROMs, Executor reimplements the ROM parts of the Mac System, MAE includes a copy of the ROM as it was an official Apple product): https://forums.irixnet.org/printthread.php?tid=977
In addition, there is a port of the Basilisk II emulator (this requires a copy of the original Mac ROMs, Executor reimplements the ROM parts of the Mac System, MAE includes a copy of the ROM as it was an official Apple product): https://forums.irixnet.org/printthread.php?tid=977
https://github.com/autc04/executor