Cause of the Problem

When you encounter a prohibited symbol on the installer while installing Eagle on macOS, it is usually because the downloaded installer file is incompatible with the processor type of your computer. Specifically, you may have downloaded a version that is not compatible with the processor type of your Mac. For instance, you might have installed a version designed for Apple chips (such as M1/M2) on a Mac with an Intel processor, or vice versa.

Resolution Steps

A. Identify Your Processor Type

Click the Apple logo in the top-left corner of your screen
Select "About This Mac"
Check the "Processor" or "Chip" information to determine if you have an Intel processor or Apple Silicon

B. Download the Correct Version

Completely exit the current Eagle installation window
Visit the Eagle official download page
Select and download the appropriate version based on your processor type:
- Intel processor: Choose the Intel version
- Apple Silicon (M1/M2): Choose the Apple Silicon version

C. Reinstall the Application

Once downloaded, double-click the .dmg file
Follow the standard installation process to complete the setup

Important Notes

Make sure to completely exit any previous installation processes before attempting to install with the new package
If you continue to experience issues, try clearing your download cache or using a different browser to download the installer
The latest versions of Eagle are optimized for different processor types, so ensure you're downloading the most recent version

Unable to Install Eagle on macOS: "Prohibited" Symbol Error