![]() I have also tested older "trash can" Mac Pro's upgraded to Catalina that were previously also crashing and disconnecting SMB shares and they too are now working. I have also tested this on older machines running Mojave and they also gained performance improvements. My machine almost reaches the theoretical max throughput of 10GbE. On my brand new Mac Pro (2019), not only did this fix issues with Final Cut Pro X freezing and disconnecting SMB network volume shares, it increased my throughput performance from 30%-50%. (I recommend rebooting your system afterwards) sudo nvram boot-args="serverperfmode=1 $(nvram boot-args 2>/dev/null | cut -f 2-)" nvram boot-argsĢ - If you do not see serverperfmode=1 returned, enter this following line of code to enable it. You should see the command return serverperfmode=1 if it is enabled. A Mac that needs to run high-performance services can turn on performance mode to dedicate additional system resources for server applications.ġ - First check to see if server performance mode is enabled on your machine using this Terminal command. These changes take better advantage of your hardware for demanding server applications. Performance mode changes the system parameters of your Mac. Imagine that, a feature in macOS literally named after creating a network performance mode. That being said, it seems that at some point in time as far back as OS X Mountain Lion some engineers at Apple created a feature called “Server Performance Mode”. The issue seems to be that macOS Catalina default system parameters for networking are not tuned for high demand network performance. Through a ton of research and some luck, I have finally stumbled across the solution to this issue with FCPX SMB performance in macOS Catalina.
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