However, if you try that, you’ll discover that it only solves part of the problem. This is readily done in the Time Machine pane. It also increases the requirement for space on the backup volume, and the rate at which that is consumed.Īdd all large files such as VMs and databases to the Time Machine exclude list.
This adds considerably to the amount which needs to be backed up every hour with relatively little benefit to the user. Even a minimal installation of Mojave in Parallels, for example, requires a 6 GB disk image, and large and active Windows VMs can readily grow to tens and hundreds of GB.īecause these are single file disk images, rather than bundles of many smaller files, there only has to be a single byte changed in them for Time Machine to have to back the entire file up all over again. Virtualisation software such as Parallels Desktop and VMware Fusion stores its VMs in single files which often grow exceedingly large. This article looks at what you can do to make your backups smaller, quicker and simpler with such large files. Unfortunately, VMs are well-known for causing problems with Time Machine backups, as are any large and monolithic files. The only way to run 32-bit Mac apps in Catalina is in a Virtual Machine (VM), which probably makes virtualisation more popular in 10.15 than any previous release of macOS.
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