Published January 15, 2014
PLEASE NOTE: This article is no longer relevant to current computers and operating systems.
I have a new Mac with an Apple Fusion Drive and running 10.9 Mavericks. Why am I getting pops and clicks, distortion, or audio dropouts?
We have been receiving customer reports of issues with Macs configured with a Fusion Drive and running 10.9 Mavericks. While we have not been able to confirm or test this in-house, it appears that there is in fact an issue with 10.9 Macs configured with a Fusion Drive that can cause audio drop outs and distortion. The issue is apparently widespread, widely known, and affects audio interfaces from virtually all manufacturers, not just PreSonus. The solution will require a software fix from Apple, so in the meantime there are several possible workarounds.
You can read more at these links:
"Issue #1 - If you own a 2013 iMac with a Fusion Drive (FD) fitted then you wil get audio dropouts and/or clicks and other audio issues. It affects all OS X versions that support FDs"
From this apple discussions thread, it appears the OSX 10.9.2 beta resolves the issue, so a general public fix may be coming soon (though we cannot confirm this at this time):
"Ok, I don't want to spread false hope, but I've been running with the 10.9.2 beta that was posted here a couple of days ago, and I haven't experienced a single drop-out yet."
"Good News: I can confirm that OS X 10.9.2 beta fixes the issue with the Fusion Drive and MBox Mini (and possibly other USB Audio devices)."
Please contact PreSonus Technical Support by creating a Support Ticket at My.PreSonus.com for further assistance.