What you need to know
- Report suggests Catalina may be experincing data loss issue within Mail App
- Moving emails between inboxes can result in blank messages which are eventually deleted.
- Data store failing to pull large numbers of messages from Mojave to Catalina.
According to the report, users on macOS Catalina 10.15.0 (build 19A583) are reporting problems when updating Mail's data store from Mojave to Catalina, and when moving messages between inbox.
So not only is data store failing to recover large numbers of messages, moving messages between inboxes appears to be turn some emails into blank messages. When devices on your iCloud see these blank messages they delete them, which in turn results in the message being deleted on your Mac as well.
The report notes that the best defence against this currently (apart from not updating to Catalina) is to ensure you have a Time Machine backup of all your Mail Data.
It is unclear at this stage whether Catalina 10.15.1, released in beta form on Friday to developers, has resolved this issue. In the meantime, anyone who relies on Apple's Mail App is strongly advised not to upgrade to macOS Catalina.
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Stephen Warwick has written about Apple for five years at iMore and previously elsewhere. He covers all of iMore's latest breaking news regarding all of Apple's products and services, both hardware and software. Stephen has interviewed industry experts in a range of fields including finance, litigation, security, and more. He also specializes in curating and reviewing audio hardware and has experience beyond journalism in sound engineering, production, and design.
Before becoming a writer Stephen studied Ancient History at University and also worked at Apple for more than two years. Stephen is also a host on the iMore show, a weekly podcast recorded live that discusses the latest in breaking Apple news, as well as featuring fun trivia about all things Apple. Follow him on Twitter @stephenwarwick9
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