Tech

Apple Mail at Catalina may lose data during upgrade

Catalos 10.15 alias Catalina may lose e-mails when switching from the previous version 10.14 (Mojave). This has the well-known developer Michael Tsai, who offers, among other things, the popular Apple Mail filter SpamSieve, detected, Apparently Mail in Catalina indicates that the import process was successful, but a larger number of messages land not or only partially in the new version.

Furthermore, Tsai reports problems moving emails to other mailboxes – both manually and via AppleScript. This can also lead to data loss – instead of the complete message, only the header would be accepted. In the worst case, such a loss of content propagates through IMAP to other computers or mobile devices; Accordingly, one should always check whether moving a mail was really successful.

According to Tsai, the current version of macOS Catalina, 10.15.0 with build number 19A583, is affected. It is unclear how often the problems occur and what exactly triggers them. SpamSieve or other plug-ins do not seem to be the same, as users who are not using any Apple Mail add-on programs are apparently affected as well. In particular users with large amounts of e-mail should be careful with the upgrade, advises Tsai.

Apple itself seems to have been informed by users, but does not yet provide a solution. Individual supporters should also have informed users that there is no way to get back to his data via a time-machine backup. In fact, however, mailboxes in the mail folder on the Mac can be fetched back into the program via the import function in Mail. It creates new local mailboxes that are not synchronized via IMAP. A return to Mojave is not advisable if IMAP is used – since the deletion of the mails is indeed synchronized.

Tsai advises his users to wait with updating to Catalina. After all, Apple is currently doing macOS 10.15.1, the first update to test. Whether the problem is solved in this, however, is unclear. As part of the upgrade to macOS 10.15, there had been some bugs in other areas as well; Catalina also ends support for 32-bit apps.

More about macOS 10.15 at heise +:

In the current Mac & i issue 5/2019 read a detailed practice on the new updates from Apple.


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. (tagsToTranslate) Apple (t) Apple Mail (t) Bug (t) Catalina (t) Data Loss (t) Email (t) Error (s) macOS (t) macOS 10.15