When someone reports the most recent version of Safari that will open their webarchives is 18.6, and that’s the only version that you find can’t open some webarchives. You’ll be only too familiar with the culprit.
bug
Normally, the x.1 update fixes many of the bugs from the first release. But in Tahoe, a crop of fresh bugs have been included. Here are some of them, and how they have arisen.
If you use Timers in the Clock app a lot, after a while the app may stop working and show a blank view. This is the result of a service hoarding old timers to its property list.
VMs running 26.1 can’t access iCloud and related services, with no workaround. Finder Services below an item’s thumbnail don’t work.
In macOS Mojave, Apple changed the way that Spotlight indexes the contents of plain text files. That introduced a bug that prevents indexing of any of the contents of files starting with certain characters. For many Macs, that bug won’t ever be fixed.
From Ventura (if not earlier) to Tahoe, Spotlight appears unable to index text files that start with two specific letters. Although those are exceedingly rare, this could still catch you out.
If you have a Mac Studio M3 Ultra and want to upgrade it to run macOS 26.0 Tahoe, […]
Want to build in Xcode 26 b3 on macOS 26 b3? You may have problems with Icon Composer icons, which may not work on previous versions of macOS. Here’s a workaround.
How a long-deprecated extended attribute can stop files such as images from being found in Spotlight search, and how to fix it.
In a VM hosted on an M4, upgrading 14.7.5 to 15.4.1 took an 8.7 GB download and worked. From 15.1 to 15.4.1 took over 15 GB and failed with a kernel panic.
The Eclectic Light Company 