Fixing that was one of the primary goals of the new windowing system.
“We decided this time: make everything we can make available,” said Federighi, “even if it has some nuances on older hardware, because we saw so much demand [for Stage Manager].”
That slight change in approach, combined with other behind-the-scenes optimizations, makes the new multitasking model more widely compatible than Stage Manager is. There are still limits on those devices—not to the number of windows you can open, but to how many of those windows can be active and up-to-date at once. And true multi-monitor support would remain the purview of the faster, more-expensive models.
“We have
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