Get the macOS 10.13.4 update that fixes security flaws

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macOS high sierra
A security update for macOS 10.13.4 patches some potential problems.
Photo: Apple

Several weeks after the release of macOS 10.13.4, today came a security update that patches some holes in this High Sierra version. This isn’t so critical that it has to be installed right now, but Apple says “This update is recommended for all macOS High Sierra users.”

There’re also security fixes for Safari 11.1, which was introduced recently too.

macOS 10.13.4 adds support for external GPUs, Business Chat conversations in Messages, as well as some other tweaks.  

Today’s Security Update 2018-001 fixes a pair of problems. One of these allows a maliciously crafted text message to fool the web browser about which URL is being opened. The other is a memory corruption issue that could grant applications elevated privileges.

New Safari 11.1 security update too

Safari 11.1 debuted earlier this month, and now there’s a security update for it. Both the problems it fixes would have allowed maliciously crafted web content to run arbitrary code.

This update isn’t just for devices running macOS High Sierra 10.13.4. Safari 11.1 runs on older versions of Apple’s operating system, of course, so this update is also for OS X El Capitan 10.11.6 and macOS Sierra 10.12.6.

While none of the bugs squashed by any of these security updates are considered dangerous, the updates should still be installed. As Apple points out, “Keeping your software up to date is one of the most important things you can do to maintain your Apple product’s security.”