Apple Responds to Developers Regarding Expired Mac App Store Security Certificates
Last week some users and developers experienced an issue that displayed a "damaged" error when attempting to open select apps from the Mac App Store, including popular apps like 1Password, Tweetbot and Byword. Today, Apple has sent an email to developers explaining what happened and how to fix their apps.
In the email, which developer Donald Southard Jr. shared on Twitter, Apple explains that the company issued a new security certificate for the Mac App Store in September in anticipation of the expiration of the old certificate. The new certificate used a stronger SHA-2 hashing algorithm instead of the old SHA-1 algorithm. Hashing algorithms are used by certificate authorities to sign security certificates.
However, two issues caused users to experience errors when starting up apps. The first issue, according to Apple, is that there was a caching issue with the Mac App Store that required users to restart their computers and re-authenticate with the Mac App Store to clear out the old cache. Apple says it's working on a fix for this in an upcoming OS X update. The other issue is that some apps were running an older version of OpenSSL that didn't support SHA-2. Apple says it replaced the SHA-2 certificate with a new SHA-1 certificate last Thursday night.
Finally, Apple says that "most of the issues are now resolved", but that some apps might still experience problems if the apps make "incorrect assumptions" about the Mac App Store's security certificates. Apple asks developers to make sure their code adheres to the Receipt Validation Programming Guide and to resubmit apps for expedited review if necessary. The AppleCare support team has also been briefed with the latest troubleshooting information for users.
Popular Stories
Verizon is experiencing a major outage across the U.S. today, with hundreds of thousands of customers reporting issues with the network on the website Downdetector. There are also complaints across Reddit and other social media platforms.
iPhone users and others with Verizon service are generally unable to make phone calls, send text messages, or use data over 5G or LTE due to the outage....
While the iPhone 18 Pro models are still around eight months away, a leaker has shared some alleged details about the devices.
In a post on Chinese social media platform Weibo this week, the account Digital Chat Station said the iPhone 18 Pro and iPhone 18 Pro Max will have the same 6.3-inch and 6.9-inch display sizes as the iPhone 17 Pro and iPhone 17 Pro Max.
Consistent with previous...
While the iPhone 18 Pro and iPhone 18 Pro Max are not expected to launch for another eight months, there are already plenty of rumors about the devices.
Below, we have recapped 12 features rumored for the iPhone 18 Pro models, as of January 2026:
The same overall design is expected, with 6.3-inch and 6.9-inch display sizes, and a "plateau" housing three rear cameras
Under-screen Face ID...
Apple today updated its trade-in values for select iPhone, iPad, Mac, and Apple Watch models. Trade-ins can be completed on Apple's website, or at an Apple Store.
The charts below provide an overview of Apple's current and previous trade-in values in the United States, according to the company's website. Most of the values declined slightly, but some of the Mac values increased.
iPhone
...
Apple and Google this week announced that Gemini will help power a more personalized Siri, and The Information has provided more details.
Subscribe to the MacRumors YouTube channel for more videos.
As soon as this spring, the report said the revamped version of Siri will be able to…
Answer more factual/world knowledge questions in a conversational manner
Tell more stories
Provide...
