Acrobat Reader Package

The certificate used to sign Acrobat or Reader Mac installers and update packages expired on February 21, 2017. Due to this expired certificate, macOS has started flagging many of Acrobat or Reader installer and patches as not signed or expired.

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  1. Adobe Acrobat Reader DC software is the free global standard for reliably viewing, printing, and commenting on PDF documents. It's the only PDF viewer that can open and interact with all types of PDF content, including forms and multimedia.
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The following full installers and patches are impacted:

  • Acrobat DC Continuous packages prior to 15.016.20041
  • Acrobat Reader DC Continuous packages prior to 15.016.20039
  • Acrobat DC 2015 packages prior to 15.006.30173
  • Acrobat Reader DC 2015 packages prior to 15.006.30172
  • Acrobat and Reader XI packages prior to 11.0.17

If you try to install any of the impacted packages, the following warning message appears:

If you try to install these packages using the command line, Mac OS blocks the installation, and the installation fails.

The latest full installers are not impacted by this issue. If you have an Acrobat/Reader full installer package that is showing a warning, download the latest version.

The installer packages at this location have been refreshed, and you should not have any issues installing from the latest packages.

Acrobat Reader Package

The latest patches for all tracks do not have this issue. Adobe recommends that you install the latest updates:

  • 15.023.20056 for Acrobat and Reader DC Continuous
  • 15.006.30280 for Acrobat and Reader 2015
  • 11.0.19 for Acrobat and Reader XI patches

Note that for all of these packages, you will not see any warning and they can be installed without any issues. But, if you explicitly fetch the certificate chain used to sign the package by clicking the 'lock' icon, it will show that the certificate has expired, as shown here:

However, the package signature is valid and OS does not block the installation in any way, which you can verify by using the pkgutil command:

pkgutil --check-signature <path to the pkg file>

Sample terminal output for 11.0.19 Acrobat package is shown below, which states that the package is signed by a certificate, trusted by the OS:

Acrobat DC. It’s how the world gets work done.

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Adobe Acrobat Reader DC software is the free global standard for reliably viewing, printing, and commenting on PDF documents.

And now, it's connected to the Adobe Document Cloud − making it easier than ever to work across computers and mobile devices.

It's the only PDF viewer that can open and interact with all types of PDF content, including forms and multimedia.

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