Go to the Compatibility tab and click on Run this program in compatibility mode for.

Locate Adobe Acrobat reader and right-click on the app.

You can change it to normal at any moment. However, you can run from the compatibility mode feature of Adobe Acrobat Reader to fix it. Thus, there might be compatibility issues. Sometimes there can be a conflict between the new system and app. You might have trouble opening the PDF when switching to new Windows version.

Wait for a few minutes and restart your computer to refresh the changes.

However, If the app is up to date, it will show No updates.

If there is an update, click on the Update button.

Follow the given steps to check for updates. However, If it is up to date, it will show No updates. You must update the program to use the advanced version. However, Adobe constantly releases new software versions with fixes and improvements. So, if you are using an older version, your PDF might not open. There can be bugs and errors in the application. You can also go to the official Adobe website and resize the PDF. In such case, you can resize the PDF file, i.e., compress the size of the PDF file into a lesser app size. So, you will have trouble opening the file. If the file size of the PDF is too large, it will take a lot of time to download it.

Select Adobe Acrobat Reader DC and click on Always Open With.

Select the PDF file and right-click on it.

Select Adobe Acrobat DC and click on Always use this app to open PDF files box.

Locate your PDF file and right-click on it.

So, you must set Adobe Reader as the default program. For instance, Microsoft Edge is the default browser to open PDF files in Windows 10 and 11. Set Adobe Acrobat DC as a Default ProgramĪlthough you’ve installed Adobe Reader on your PC, it might open on a different app or browser.

Then, you can open the file with Adobe Reader. In such a case, you need to unlock a PDF file to open it.

So, if you don’t have access to the password for the file, you won’t be able to open it. Usually, some users protect their PDF file if it is confidential. Besides, here are 11 fixes you can try to open your PDF. So, before implementing other fixes, you can try unlocking the PDF and opening it. Similarly, your PDF won’t open if it is protected. So, you can install Adobe Acrobat Reader or any other reader to fix the issue. You cannot open a PDF file if there is no PDF reader program on your device. File Incompatible with the PDF reader program.The most general reason why your PDF file won’t open is if it has downloading errors.

Pdf not opening on mac