"On the M1 through the M4 (and on the MacBook Neo's A18 Pro, a relative of the M4 family), performance cores will stay performance cores, and efficiency cores will stay efficiency cores. The macOS 26.3.1 update is also required to support Apple's new Studio Displays."
"Each of these monitors, like the original, is still a sort of iOS device on the inside. They use Apple's A19-series chips, up from the A13 in the original Studio Display, and they run iOS-derived software that is updated periodically by the Mac you have them connected to."
"Not all Macs support the Studio Displays, and even the ones that do aren't always capable of driving the Studio Display XDR at its full 120 Hz refresh rate. The support lists are included on the specs pages for each monitor—note that the last few Intel Macs don't make the list at all."
macOS 26.3.1 does not alter performance or efficiency core behavior on M1 through M4 Macs, maintaining existing architecture. The update is necessary to support Apple's redesigned Studio Displays, which contain A19-series chips upgraded from the original A13 processors. These displays function as iOS devices internally, running iOS-derived software that receives periodic updates through connected Macs. Communication between Macs and Studio Displays extends beyond standard Thunderbolt and DisplayPort signals, requiring software support on the Mac side. Not all Macs support the new Studio Displays, and compatibility varies for driving the Studio Display XDR at full 120 Hz refresh rates. Recent Intel Macs lack support entirely.
#macos-2631-update #m-series-processors #studio-display-compatibility #apple-hardware-specifications #mac-display-support
Read at Ars Technica
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