There are no files with changed version or build numbers among the bundled applications (in /System/Applications), nor do any files in the System Library (/System/Library) have changed version or build numbers. I have now had a chance to examine exactly what is in this update. If you wish to read more about the nature of the vulnerability, it’s described here in full detail in its iOS version. Updating is therefore strongly recommended, as soon as you can. The security fix is for a vulnerability in IOMobileFrameBuffer which allows an app to execute arbitrary code with kernel privileges, and Apple has had a report that this has been actively exploited. Another possibility is that those Macs which have been updated to run a Monterey beta may not be able to ‘see’ this update.
#DOWNLOAD DROPBOX FOR MAC BIG SUR UPDATE#
You may therefore need patience to obtain the update, as well as greater patience installing yet another large update when so little in it has changed. My M1 Mac mini next to it can’t find the update at all, despite looking repeatedly for it.
My Intel iMac Pro found it immediately, but had to restart the download when its first attempt had almost completed. Although this apparently brings just one urgent security update, it’s around 2.2 GB for Intel Macs, and over 3.1 GB for M1 Macs.Īvailability of this update from Apple’s servers is patchy. Apple has just released a surprise ‘patch’ update to macOS Big Sur, to bring it to version 11.5.1.
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