Apple’s getting ready to hunker down for the holidays, so the company has updated all of its shipping operating systems with bug fixes and a few features.

One of the big changes in macOS 10.15 Catalina is that Apple has replaced the default bash shell in Terminal with zsh, a move that is sure to cause headaches for system administrators. Josh Centers offers some resources to help you adapt to the change.

Apple has replaced the 15-inch MacBook Pro with a new 16-inch model that features a redesigned keyboard with a return to scissor switches and inverted-T arrow keys, as well as a few surprises.

Reports of boot problems after installing Security Update 2019-001 (Mojave) are rolling in. The common factors seem to be installing on a Mac with a T1 or T2 security chip and the user interrupting the installation because it seems to take too long.

Hot on the heels of iOS 13.2 and iPadOS 13.2, Apple has pushed out macOS 10.15.1 Catalina, watchOS 6.1 (with support for the Apple Watch Series 1 and Series 2, finally!), and tvOS 13.2. All three offer support for the new AirPods Pro and bring bug fixes.

With the AirPods Pro, Apple has made wireless earbuds more attractive to anyone who has trouble with the fit of the first- and second-generation AirPods and to those who would appreciate active noise cancellation in loud environments.

Signing certificates for macOS installers have expired, so Apple consultants and IT admins who maintain troubleshooting toolkits containing older installers will need to download new copies.

macOS 10.15 Catalina has a pair of new features that let you use an iPhone or iPad to draw sketches for insertion into a Mac document or message and mark up Mac documents. Here’s how to use them.

By most accounts, the release of iOS 13 and macOS 10.15 Catalina have been troubled, with numerous significant bugs making it past Apple’s internal testing and the public beta phase. Former Apple engineer David Shayer explains the underlying reasons these releases have had so many problems.

Apple has updated iOS 13, iPadOS, and macOS 10.15 Catalina to squash some of the many bugs still remaining.

Here’s yet another reason to hold off on upgrading to macOS 10.15 Catalina—reports of data loss in Mail after updating its data store from Mojave to Catalina and when moving messages between mailboxes.

Apple has released macOS 10.15 Catalina, matching the date on which Europeans first arrived on the island of Catalina in the year 1542. We advise delaying upgrades to Macs you rely on, or at least upgrading cautiously.

Curious about how much work Apple is putting into improving the data underlying its Maps app? With Apple’s release of the Northeast US map data, Justin O’Beirne has posted a fascinating comparison of the old and new maps.

While macOS 10.15 Catalina won’t support old 32-bit apps, you can keep them running indefinitely on your Mac by installing a copy of 10.14 Mojave in a Parallels Desktop virtual machine.

Despite saying nothing during its iPhone announcement event, Apple has quietly revealed that iOS 13 will ship on September 19th, with iOS 13.1 following soon after on September 30th. With no other word from Cupertino, Adam Engst makes some guesses about macOS 10.15 Catalina, watchOS 6, and tvOS 13.