Repeat Mac App Store mess forces some to reinstall purchased programs

Gregg Keizer
17 February, 2016
View more articles fromthe author

Some Mac owners today faced error messages or applications that balked when launched in a repeat of the November 2015 expired-digital-certificate issue.

Three months ago, a lapsed Apple-issued certificate triggered a fiasco that prevented Mac users from running software they’d purchased from the Mac App Store.

“Some of my Mac apps won’t open today. I know why, and I know a re-install fixes it… but… sigh. Mac App Store: It Just Works* (*sometimes),” tweeted Russell Ivanovic, a mobile app developer at Shifty Jelly.

“If you have a product in the Mac App Store, be advised that the MAS had a certificate expiration over the weekend. Brace for impact,” warned Rich Siegel, also on Twitter. Siegel is the founder of Bare Bones Software, and the creator of BBEdit, an HTML and text editor for the Mac.

In a support document aimed at developers, Apple said that an earlier certificate expired Sunday 14 February. Developers were told that they must use the newest certificate – issued Monday 15 February – before submitting apps to the company for approval and placement in the Mac App Store.

Most paid apps regularly check with Apple’s servers to make sure that a receipt exists for the purchase before running; the receipt is signed with a certificate.

The certificate in question was used to digitally sign app installers, according to Rich Trouton, an OS X systems administrator, who published a short explanation on his personal blog Monday.

Apple’s support document said that the certificate swap would not affect iOS and tvOS apps, nor Safari extensions, but added a caveat about OS X apps. “Users running OS X El Capitan (v10.11 or v10.11.1) may receive a notification that your Mac app is damaged if it utilises receipt validation to request a new receipt from Apple,” the document said. “They can resolve this issue by restarting their Mac or updating to OS X El Capitan (v10.11.2) or later.”

Computerworld staffers running the latest El Capitan beta – OS X 10.11.4 – encountered dead apps early on Tuesday, including Byword (a text editor), the Fantastical 2 calendar and Clear Day (a weather app). Some apps threw out a request for the Apple ID password used to access the Mac App Store – in some cases only a fleeting dialogue box – but other apps just would not launch.

Restarting the Mac did not help. But as Ivanovic pointed out, dragging the applications to OS X’s Trash, then reinstalling them by downloading them again from the Mac App Store, did the trick.

One Comment

One person was compelled to have their say. We encourage you to do the same..

  1. Richard Banham says:

    Thanks for this article. I use 2Do as my tasks manager and yesterday it just stopped working on the Mac but not on my IOS Devices. I tried reinstalling yesterday but it still wouldn’t open. I tried installing from backups etc to no avail. I reloaded Things my second preference for a task manager and spent 30 mins setting it up again on all my devices.
    After reading your article today I tried reloading 2Do from the Mac Store and hey presto it worked perfectly. Now I am back to where I want to be.
    This really was a nuisance and time waster and I wonder how many people thought their app was broken and just deleted it?
    Thanks for the info. Would be nice if Apple told us instead.

Leave a Comment

Please keep your comments friendly on the topic.

Contact us