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PSL Mac Installation Instructions


If you see “this software needs to be updated. contact the developer for more information” when installing PSL please follow these steps:

  1. If you see a message like the one below, please click Cancel and begin by opening your computer’s System Settings. 
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  2. Go to Security & Privacy. Click the Open Anyway button towards the bottom of the popup to confirm your intent to open or install the PSL+ installer app.  
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  3. The warning prompt will reappear, and if you’re ready to proceed, click Open.
  4. The new PSL+ installer app will now be saved as an exception to your security settings and you can open the file in your downloads folder by double-clicking it, just as you would for any app on your Mac.
  5. After this step, please proceed as normal to run the new download.

Still experiencing trouble? Please contact [email protected].

Source: Apple Support Article – Safely open apps on your Mac 

Help Center article: MICR Check Printing

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