Apple has today released macOS 10.14.6 Supplemental Update 2, along with iOS 12.4.2 and watchOS 5.3.2 for older devices for which the latest operating systems are not available.
According to Apple's release notes, via MacRumors, the updates address a vulnerability that could allow a remote attacker to, "cause unexpected application termination or arbitrary code execution." Users running iOS 13.1 and watchOS 6 are not believed to be impacted by this vulnerability.
As these updates were released to address a specific security vulnerability, it is unlikely that they contain any accessibility changes for blind and low vision users. However, if you notice any fixes, enhancements, or regressions in today's releases, please do let us know by posting a comment below.
How to update
iOS 12.4.2 is available via Over-the-Air Update (Settings > General > Software Update) or via iTunes on a Mac or PC.
Before updating, we strongly recommend making a full and complete backup of your device (either in iTunes or iCloud, depending on personal preference). This will ensure that, in the unlikely event that something goes wrong during the update process, you will have a current backup on hand in case a device restore becomes necessary. Also, if using OTA update, we recommend plugging your device into a power source for the duration of the download/installation process - so as to prevent the unlikely event of your battery going dead during the update.
More information on how to update the software on your iOS device is available on this Apple Support page.
macOS Mojave 10.14.6 Supplemental Update 2 can be downloaded by going to System Preferences > Software Update.
watchOS 5.3.2 is available by going to the Watch app on your iPhone and navigating to General> Software Update. To install the update, your Watch must be connected to its charger and have at least 50% battery power.
As always, we look forward to hearing your thoughts on these updates.