Created on: May 18, 2020
Last updated: April 19, 2022
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It was recently discovered that a small number of OWC customers using the Accelsior 4M2 SSD in combination with the new 2019 Mac Pro, would sometimes encounter problems where their computer would "hang" when waking from sleep, or go into a kernel panic, forcing a restart of the computer.
It was recently confirmed by our SoftRAID team, that this is is triggered by installing one or more Accelsior 4M2 cards into specific PCIe slots (4 and/or 5) and using specific settings in Apple's Expansion Slot Utility (column 'B' PCIe lanes for either or both slots).
If you have experienced this issue, please read the article below for complete details, including a couple easy work-arounds to resolve this behavior in the short term. The article will be updated to reflect any new developments from Apple.
https://blog.macsales.com/62122-investigating-preventing-kernel-panics-in-the-2019-mac-pro/
