69793: Acronis Cyber Protect: macOS backup fails with "Operating system error: Resource deadlock avoided"

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Last update: 03-02-2023


A backup of a Mac fails with:

Error code: 65521
Fields: {"$module":"disk_bundle_macia64_28156","code":11,"function":"read","path":"/System/Volumes/Data/Users/Username/Library/CloudStorage/Folder"}
Message: Resource deadlock avoided


The folder /Users/[username]Library/CloudStorage/<XXXXXX> is the folder for iCloud files on Mac. These files are stored on the cloud rather than on the local machine.


Acronis Cyber Protect Cloud: This issue has been fixed in C21.12, please update to the latest build,

Acronis Cyber Protect 15: this issue has been fixed in Acronis Cyber Protect 15 Update 4 (Build 29240). Please update to the latest build.

If this path is specified explicitly there still will be a warning because the files are really in the Cloud.

Workaround for earlier builds: go to  'File filters' option > 'Do not back up files matching the following criteria' and add the following 2 lines: