To change the date from Terminal (which is likely all that will be accessible), follow these steps, which set it to 1 February 2016: Before you install, set the clock on the Mac to a date when the certificate was valid, perform the install, and then reset the date back after installation. However, if you have installers for 10.9 Mavericks, 10.8 Mountain Lion, and 10.7 Lion, TidBITS Talk reader gastropod suggested a workaround for their expired certificates. Historically, they appeared in the App Store app, in your list of purchased items, but the only operating systems still showing up there for me are the developer beta of Sierra and the GM candidate for El Capitan (and I doubt they’d work anyway). If you want to rebuild your archive, you can download new installers from links on these pages:Īpple says that earlier versions are not available for download, and as far as I can tell, that’s true. The Finder may report that those installers can’t be verified and may have been corrupted or tampered with during download.Īpple has now re-signed and re-released older installers, giving them a new expiration date of 14 April 2029-nearly 10 years in the future. The people who are being impacted are Apple consultants and IT admins who have built troubleshooting toolkits that contain a selection of macOS installers for rebuilding Macs with whatever version of macOS is required. That has happened again, since many, if not all of Apple’s recent installers had an expiration date of 24 October 2019, which came and went last week.įor most Mac users, this kerfuffle is largely irrelevant-if you need an installer for an older version of macOS, you’ll get one that will work when you download it. On his Der Flounder blog, Rich Trouton explains what happens when these certificates expire-Apple reissues the installers with new certificates.
That’s sensible, but there’s a gotcha: the certificates Apple uses to sign these installers have expiration dates. Redownload Archived macOS Installers to Address Expired CertificatesĪpple digitally signs the installers used by its software updates to ensure that they haven’t been tampered with.
#1649: More LastPass breach details and 1Password switch, macOS screen saver problem, tvOS 16.3.3 fixes Siri Remote bug.
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