Almost a month after Microsoft released its fixed for KRACK in October, Apple has released updates for all four of their operating systems. And while it’s new emojis and other window dressing that you’ll notice up front, a fix fit the KRACK vulnerability is a big ticket item.
I find Apple’s update process to be very frustrating. There’s no official schedule so you can plan - which makes managing a fleet of Macs or iOS devices more challenging than it should be - and when an important issue, like KRACK is publicised they don’t seem to have a way of dealing with it.
In any case, if you’ve got an iOS device, go to Settings and then scroll into the General section. Tap on Software Update and follow the prompts to update your iPad or iPhone.
Mac users can get the update by launching the App Store and opening the Updates tab.
tvOS and watchOS have also been updated.
Security updates 2017-001 and 2017-004 for Sierra and El Capitan respectively contain just fixes for the KRACK wi-fi exploit.