Serious macOS Sonoma 14.4 bug wipes file versions in iCloud Drive

macOS Sonoma 14.4
WARNING: If your Mac is running macOS Sonoma 14.4 and you save documents to iCloud Drive and you have Optimize Mac Storage turned on, files that you save to iCloud Drive are at risk of losing all their saved versions.
Eclectic Light Company:
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In previous versions of macOS, when a file is evicted (‘Remove downloads’) from local storage in iCloud Drive, all its saved versions have been preserved. Download that file again from iCloud Drive, and versions saved on that Mac (but not other Macs or devices) have remained fully accessible. Do that in 14.4, and all previous versions are now removed, and lost forever.
From my previous testing, that certainly doesn’t happen in Ventura, and when I tested earlier in 14.3, that wasn’t what I observed either.
If you value the saved versions of your documents, either:
• don’t put them into iCloud Drive at all, or
• turn Optimise Mac Storage off, so they can’t be evicted from local storage.

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MacDailyNews Take: We expect macOS Sonoma 14.4.1 will be along shortly to correct this issue. See also: macOS Sonoma 14.4: Reasons Not to Update – MacRumors, March 19, 2024
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