Plugable Microscope not working after macOS 10.15 Catalina? We can help!


One of the biggest changes in macOS 10.15 (Catalina) is support for 32-bit legacy applications has been phased out. Catalina and future versions of macOS operating system support only 64-bit applications. (You can read more about this in our Catalina blog post and on Apple’s site if interested.)

As a result, if you’ve recently updated your macOS version to 10.15 (Catalina), you may have noticed that your 32-Bit applications no longer launch. The software we’ll be focusing on here is the 32-bit version of Plugable’s Digital Viewer, used by the Plugable USB2-MICRO-250X and USB2-MICRO-800X microscopes. The 32-bit version of Digital Viewer will show an error when attempting to run in Catalina, stating “Digital Viewer needs to be updated.”

Thankfully, we’ve been working on a solution! Just in time for Catalina, we’ve got an updated version of the Digital Viewer software which fully supports Apple’s 64-bit application requirements and includes several other usability improvements. Read below for step-by-step instructions on how to upgrade to this new version.

Step-by-step instructions are presented below. For those seeking a quick summary: we suggest uninstalling the current 32-Bit version of Digital Viewer on your Mac and restarting. After uninstalling and restarting, download Plugable’s 64-bit Digital Viewer software here and install: Plugable Digital Viewer v3.3.30.pkg.

Installation Instructions

Step 1: Uninstall the current 32-Bit Version: Go to your Applications folder, click and drag the 32-Bit version of the Digital Viewer into your trash bin, and delete it

Step 2: Download the new 64-Bit Package Installer, launch, and click “Continue” to proceed

Step 3: Click “Install” to begin the installation

Step 4: Enter your password, and then click, “Install Software” to continue

Step 5: You should receive this message about successful installation. Go ahead and restart your Mac

Step 6: After restarting, open up the new Plugable Digital Viewer application, and make sure to set the, “USB Microscope” as the default device in the Settings. Click “Apply” to save this change.

Please feel free to comment below, or reach out to us directly at:

11 comments on “Plugable Microscope not working after macOS 10.15 Catalina? We can help!”

  1. Oksana Sakalo Reply

    I uninstalled the old file and installed the 64-bit program. In settings, the USB Microscope did not appear and could not be found. What have I done wrong?

    • Kevin Lamb Reply

      Hello Oksana,

      Thanks for reaching out to us! I am really sorry to see you’ve had this trouble with the microscope, and I am here to help. I’m sure you didn’t do anything wrong. Are you able to try the microscope on a different computer ot see if you get the same result? I understand if this isn’t a possibility to try.

      We should check the Privacy and Security settings to make sure the microscope is enabled. Please feel free to reach out to us directly at:, and we’ll be here to help.

      Thank you,

      Plugable Support


    My name is Belvi Cáceres from Perú, I bought the Digital Microscope MODEL USB2-MICRO-250X and I don’t know how to install it to make it work, I need help, wait fro your answer.

    Belvi Cáceres

    • Kevin Lamb Reply

      Hello Mike,

      Thanks for reaching out to us, and thanks for the feedback. Glad to see the updated application is doing the trick for you on macOS 10.15 Catalina.
      Catalina has been a great update overall, but, it has complicated the installation process of some programs and drivers. Please let us know if anything comes up, and we’ll be here to help.

      Thank you,

      Plugable Support

  3. Russell Rhoades Reply

    Thanks for making a software version for macOS Catalina, I have used this Microscope for a few years with my old computer,
    I was worried that I could not with my new computer , I was just ecstatic when ni found their was a new version for this Mac.
    Thank you

    • Kevin Lamb Reply

      Hello Russell,

      Thanks for reaching out to us! Glad to see our latest release of Digital Viewer did the trick for you on macOS Catalina. This has been a good update so far, but, it has prompted updates from other programs such as ours for compatibility. Feel free to reach out to us directly at: with any questions or concerns, and we’ll be here to help.

      Thank you,

      Plugable Support

  4. Heidi Reply

    Thanks for the updated 64bit version, however, I had saved files from the previous version and I cant find them. Any ideas are welcome.
    After installing, I had to plug the camera so the program could recognize the USB Camera option

    • Derek Nuzum Reply

      Hi Heidi,

      Thanks for your message! The default save location is typically in the Documents folder in macOS for each specific user in a folder named Plugable Digital Viewer or Digital Viewer. This setting is user-configurable via the Settings (cog wheel) menu. If you are unable to find this folder, please send a message to with Ticket #310916 in the subject line and we would be happy to help!

      Thank you,

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