![]() ![]() ![]() CCC will not update the System volume on a Legacy bootable copy of the startup disk (Big Sur and later) ![]() If you are not happy with the performance and reliability of Apple's SMB filesystem client on the latest version of maCOS, please share that feedback with Apple, and please feel free to include our FB9857268 bug report number in that feedback. While we recommend using AFP whenever it is an available option, it's important to note that AFP is a deprecated protocol and that some NAS vendors have started to drop support for it (e.g. Hold down the Option key and choose "Switch to AFP" (provide the credentials for the NAS volume again if prompted).Click on the Source or Destination selector (whichever is applicable for your particular task).Open CCC and select the applicable backup task.Eject the NAS volume if it's currently mounted.Workaround: We have confirmed that using AFP rather than SMB consistently avoids these behaviors (in cases where using AFP is an option): Likewise, we haven't received any additional reports of this issue from any 12.3 users. We're still able to reproduce high memory pressure, however we're no longer seeing the complete memory zone exhaustion that was leading to kernel panics. ![]() Apple indicated that they had made significant progress on this issue in the 12.3 update. We reported this issue to Apple in January 2022 (FB9857268). This problem is limited to Apple Silicon Macs and SMB volumes. Specifically, the "kext.kalloc.32768" memory zone is expanded until it can no longer be expanded ("zone_map_exhaustion" occurs), at which point the memoryd system process starts to terminate idle processes. The underlying problem appears to be a memory leak in the macOS kernel or one of the kernel extensions. We were able to reproduce this behavior using a simple shell script that creates files and folders on SMB-mounted NAS volumes (and also with Finder copies).
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