• Q10010902- I have had the problem with ARC-1221x volume mounting and 10.5.6 upgrade. I have OS (reverted back to 10.5.5) installed on internal drive. I am getting errors when trying to run recommended driver update (132_81223). Tried to install with and without ext RAID connected, also tried to install as 'root' user. We got the following errors. Install File: /System/Library/Extensions/ArcMSR.kext/Contents/MacOS/ArcMSR Status: ERROR
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