Apple has just released urgent security updates to bring macOS Sequoia to 15.6.1, Sonoma to 14.7.8, and Ventura to 13.7.8.

Security release notes for these are already available, for 15.6.1, 14.7.8 and 13.7.8 Each refers to the same single vulnerability in ImageIO, which is apparently being exploited “in an extremely sophisticated attack against specific targeted individuals” using a crafted image file.

The download for 15.6.1 is about 1.56 GB for an Apple silicon Mac, and should be well under 1 GB for Intel. Time to update!

We’re now into August, Apple has released the last substantial updates to macOS before the arrival of Tahoe, so where does macOS stand now?

macOS Sequoia has just had its last scheduled update to 15.6 before it’s expected to enter the first of its two years of security-only updates. The main benefits of this update are an important fix to restoring Macs in DFU mode using either the Finder or Apple Configurator, and its long list of security updates, 81 vulnerabilities in total. If you’re already running Sequoia, it’s an important update.

Sequoia is fully supported on the following Macs:

• iMac 2019, all T2 iMacs including iMac Pro from 2017
• MacBook Air 2020 and later, but not 2018 or 2019
• MacBook Pro 2018 and later (all T2 models)
• Mac mini 2018 and later
• Mac Pro 2019 and later
• all Apple silicon Macs.

macOS Sonoma is now entering its second and final year of security-only updates, and in the latest to 14.7.7 has around 50 vulnerabilities fixed. Although that’s a lot less than in 15.6, those are still important if you’re staying with Sonoma for the time being.

Sonoma is fully supported on the following Macs:

• iMac 2019
• all Intel Macs with T2 chips
• all Apple silicon Macs.

macOS Ventura has probably had the last of its security updates, although in the past Apple has sometimes released one more update in the autumn/fall. Its latest update to 13.7.7 has around 41 vulnerabilities fixed, making it essential if your Mac can’t be upgraded to Sonoma or later. If your Mac is supported by Sonoma, now is the time to plan upgrading it so that it can continue receiving security updates from September.

Tahoe

macOS Tahoe has now entered the public phase of its beta-testing, with the fourth version provided to developers. While much of the debate surrounds its Liquid Glass and new look, it does bring new features such as a Phone app to Macs. So far it appears internally stable and doesn’t look likely to be delayed for major bugs to be wrangled.

Tahoe is fully supported on the following Macs:

• MacBook Pro 16-inch 2019, and 13-inch 2020 with four Thunderbolt ports,
• iMac 2020,
• Mac Pro 2019,
• all Apple silicon Macs.

Although the first couple of versions of Tahoe presented themselves to older apps and scripts as macOS 16, since beta 3 it has been thoroughly macOS 26 regardless of how it’s asked. As this hasn’t been mentioned in Apple’s release notes, it’s unclear what it will do in the final release. If you have apps or scripts that could break when they discover the version of macOS running is 26, now is the time to send Apple feedback to make your case for it to report as version 16.

Older Macs

Open Core Legacy Patcher, OCLP, is being updated in the hope that it will be able to run macOS Tahoe on at least some unsupported models, although that probably won’t be available until the end of this year. You can follow progress here, where you’ll see some of the challenges its developers are facing. Another site worth watching is Mr. Macintosh on YouTube.

Next stop, probably in September, should be:

• macOS 26.0 Tahoe
• macOS 15.7 Sequoia
• macOS 14.8 Sonoma

if Apple remains consistent with previous numbering. Farewell to Ventura, old friend!