Likes in the case of the alerts received by Apple Watch wearers for older watchOS apps, this is a one-time warning that you won't see again.

If you updated your Mac to the macOS High Sierra 10.13.4 release, the next time you'll open your favorite apps, you'll see a warning that the app isn't optimized for your computer, which means that it hasn't been updated recently by its developers to use 64-bit processes. Some big apps out there need to be updated others will disappear Apple began the transition to 64-bit hardware and software technology for Mac over a decade ago, and is working with developers to transition their apps to 64-bit,' said Apple. 'To ensure that the apps you purchase are as advanced as the Mac you run them on, all future Mac software will eventually be required to be 64-bit. With the macOS High Sierra 10.13.4 software update released last month, Apple implemented a tool for application developers to test their apps for 64-bit compatibility as 32-bit deprecation is upon us with future macOS releases, and now it looks like users are being warned about 32-bit app compatibility as well. In fact, Apple does not even allow apps from non-trusted developers to be downloaded without explicitly overriding security settings.Īpple has not yet responded to requests for comment about the potential vulnerability.As announced last year during the WWDC (Worldwide Developer Conference) event, Apple will deprecate support for 32-bit apps in future versions of its macOS operating system for Mac computers. Security researcher and ex-NSA analyst Patrick Wardle tweeted about the vulnerability early this morning and shared a video of the exploit in action.įor this vulnerability to work, a user needs to download malicious third-party code from an unknown source, something Apple actively discourages with warnings about apps downloaded outside of the Mac App Store or from non-trusted developers. 'macOS High Sierra, released to the public today, could be impacted by a major security flaw that could allow a hacker to steal the usernames and passwords of accounts stored in Keychain.Īs it turns out, unsigned apps on macOS High Sierra (and potentially earlier versions of macOS) can allegedly access the Keychain info and display plaintext usernames and passwords without a user's master password. MacOS High Sierra Vulnerability Allegedly Allows Malicious Third-Party Apps to Access Plaintext Keychain Data

May want to hold off on updating just now:

Apple macos high sierra compatibility