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Original poster
Apr 12, 2001

According to some digging into Apple's "BridgeOS 2.0" code and macOS this weekend by Jonathan Levin, Steven Troughton-Smith, and Guilherme Rambo, the upcoming iMac Pro appears to feature an A10 Fusion chip with 512 MB of RAM. While the full functionality of the A10 chip isn't yet known, it appears the chip will enable support for "Hey Siri" functionality, potentially even when the iMac Pro is turned off.


As noted by Troughton-Smith, the A10 will manage the booting process and security for the iMac Pro, and with hooks into system audio, he theorized that the chip might support always-on "Hey Siri."

Confirmed: "Hey, Siri" is coming to the Mac - Guilherme Rambo (@_inside) November 18, 2017
The "Hey Siri" theory was quickly confirmed by Rambo, who shared both a boot chime for BridgeOS and the setup process for "Hey Siri" discovered within macOS.

BridgeOS has a boot chime sound - Guilherme Rambo (@_inside) November 18, 2017
Rumors of ARM-based chips being included in Macs have been circulating for some time, and with the T1 chip appearing in the MacBook Pro to drive the Touch Bar last year, the rumor began coming to fruition. The T1 was just the first step in the process, however, with Bloomberg reporting in February that a custom "T310" ARM-based Mac chip similar to the T1 could be included in future Macs and take on some additional functionality such as handling "Power Nap" low-power mode functionality.

In June, Pike's Universum reported that the upcoming iMac Pro will include a Secure Enclave, suggesting the machine would indeed include an ARM-based coprocessor as on the MacBook Pro.

Unveiled at WWDC in June, the iMac Pro is scheduled to launch next month, but Apple has yet to give a specific launch date for the high-end desktop that will start at $4999.

Article Link: iMac Pro Appears to Include A10 Fusion Chip for Always-On 'Hey Siri'


macrumors 68020
Jun 13, 2016
That is really cool.

The first Mac with an A-series processor in is coming earlier than any of us imagined! Of course this is different, but it’d be interesting to see it used for other things like app development (iOS emulation).

This was the always way they were going to be used in Macs (i.e. as a coprocessor) in the near future, with the exception of the 12” MacBook where I wouldn’t be surprised if it replaced the current Intel chips.
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macrumors 68000
Feb 1, 2014
That's an incredibly powerful CPU to run just a "Hey Siri" interface. It would be nice if they also allowed the A10 to run iOS. They could use for an "internet appliance" mode that boots instantly and lets you run Safari without concern for viruses. Throw in App store compatibility and you'd have a killer iOS/Mac OS convergence device.
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