11/18/2023 0 Comments Spamsieve catalina![]() ![]() Although some of us were hoping that Catalina would support making Time Machine backups to APFS volumes, it doesn’t. However, the version of Time Machine included in 10.15 doesn’t work the same as that in Mojave, and some users are reporting problems with their backups when upgrading to Catalina. ![]() In this article I try to pass on what has changed, and how you can best address problems if they arise.Īpple’s documentation hints that something has changed, but doesn’t explain what. SpamSieve uses a variety of methods to identify spam messages, but by far the most important is a statistical technique known as Bayesian analysis.For a more in-depth treatment of this technique applied to spam, see this article by Paul Graham and the papers it references. New backups that are created can be used only on macOS Catalina.” In one Help page, Apple points out that “if you create a backup on a Mac or partition with macOS Catalina, you can only use that backup on Mac computers or partitions with macOS Catalina.”Īdditionally, in this article: “If you upgraded to macOS Catalina on a Mac that uses a Time Capsule or other network storage device as the backup destination, your existing backups are also upgraded and can be used only on macOS Catalina. Unfortunately, Apple doesn’t appear to document Time Machine for developers or advanced users, so that is all that I can find at present. If you back up to a Time Capsule – or to another networked storage device – it appears that this change is reflected in the extension used by Time Machine backups, which change from being. backupbundle to reflect their being updated for 10.15. Once they have been changed, they can no longer be accessed from any earlier version of macOS, at least not recognised as containing a Time Machine backup. backupbundle can still be mounted using an older DiskImageMounter app in /System/Library/CoreServices, although whether you can use Time Machine to retrieve any of its contents remains unclear. Many users have had no problems with their Time Machine backups following upgrading to Catalina. A range of problems have been reported by some users, typically that Time Machine refuses to make any new backups to an existing backup set. The best answer then is to start a new backup set, if possible. There are good reasons for creating a new backup set for Catalina anyway. SPAMSIEVE CATALINA FULLĪs all system files are replaced, most other files change paths, and Catalina has a complete new layout on two APFS volumes, the first backup after upgrading is likely to approach the size of a full backup anyway. Giving it a clean start also means that your existing backups shouldn’t be converted to the new format, allowing you access to them if you needed to revert to Mojave, for instance. This is also a wise choice if you want to run your Mac as a dual-boot system, perhaps being able to boot back into Mojave for occasional use of 32-bit apps which Catalina has rendered inaccessible. I correct errors, and continue to be appreciative of your work.My summary recommendations are therefore:ĭual-boot systems don’t fit very well with Time Machine anyway, and you should avoid trying to run Time Machine backups in both versions of macOS for these reasons. This setup seems to work just fine: there are very few false negatives or positives generated. Mine is an IMAP account from a local ISP ( here in Santa Cruz), which as far as I can see has little or no server-side filtering. I’ve been using SpamSieve since 2008, and now have a drone setup running SpamSieve 2.9.48 in Mail.app 16.0 under macOS Monterey (at my desk computer), with an iPhone SE (2020) and an older MacBook Air (macOS Catalina) for running around and travel. ![]()
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