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Asahi Linux finds macOS bug that leaves machines unbootable • The Register

Asahi Linux finds macOS bug that leaves machines unbootable • The Register

2023-11-01 12:07:38

Asahi Linux, a mission to port Linux to Apple Silicon Macs, has reported a mix of bugs in Apple’s macOS that might go away customers with {hardware} in a difficult-to-recover state.

The problems revolve round how latest variations of macOS deal with refresh charges, and MacBook Professional fashions with ProMotion shows (the 14 and 16-inch variations) are affected. In line with the Asahi staff, the bugs lurk within the improve and boot course of and, when mixed, can create a situation the place a machine all the time boots to a black display screen, and a Machine Firmware Replace (DFU) restoration is required.

Asahi Linux’s techies have appeared into the problem, having first suspected it had one thing to do with both having an Asahi Linux set up on a Mac after which upgrading to macOS Sonoma or putting in Asahi Linux after a Sonoma improve. Nonetheless, the problem seems to be unconnected to the mission.

The staff said: “So far as we are able to inform, ALL customers who upgraded to Sonoma the conventional means have an out-of-date and even damaged System RecoveryOS, and particularly MacBook Professional 14″ and 16″ homeowners are weak to ending up with a totally unbootable system.”

Whereas this may sound alarming, the staff was at pains to assure users that information was not in danger and solely sure variations of macOS have been affected – Sonoma 14.0+ and Ventura 13.6+.

The primary bug is expounded to macOS Sonoma utilizing the beforehand put in model as System Restoration, which might trigger issues when an older RecoveryOS runs into newer firmware.

The second happens if a show is configured to a refresh price aside from ProMotion. In line with the Asahi Linux staff, the system will now not have the ability to boot into previous macOS installs or Asahi Linux. “This contains restoration mode when these techniques are set because the default boot OS, and likewise System Restoration no less than till the following subsequent OS improve.”

The Asahi Linux installer has been tweaked to verify for the problem and can refuse to put in if the refresh price on affected machines is about to something aside from ProMotion mode. It is going to additionally carry out an integrity verify to confirm the standing of the System Restoration partition earlier than making any adjustments.

The staff famous: “Even customers with simply 13.6 put in single-boot are affected by this problem (no Asahi Linux wanted).

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“We don’t perceive how Apple managed to launch an OS replace that, when upgraded to usually, leaves machines unbootable if their show refresh price will not be the default. This appears to have been a serious QA oversight by Apple.”

The Register contacted Apple to get its tackle the report and can replace ought to the corporate reply. ®

 

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