GeckoDriver and Selenium encounter Exec format error on MacOS resulting in OSError: [Errno 8]

While developing a bot using Firefox Gecko Driver, I keep encountering error messages originating from the following lines of code:

from selenium import webdriver

browser= webdriver.Firefox()

Despite adding all the necessary files to my path, including the gecko driver, firefox, and other smaller documents mentioned in the error message, I am still unable to resolve the issue.

Below is the specific error message that I am facing:

Traceback (most recent call last):
  File "/usr/local/bin/fuckobot1.py", line 3, in <module>
    browser= webdriver.Firefox()

File "/Users/'myname'/Library/Python/2.7/lib/python/site-packages/selenium/webdriver/firefox/webdriver.py", line 164, in __init__
    self.service.start()

File "/Users/'myname'/Library/Python/2.7/lib/python/site-packages/selenium/webdriver/common/service.py", line 76, in start
    stdin=PIPE)

File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/subprocess.py", line 710, in __init__
    errread, errwrite)

File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/subprocess.py", line 1335, in _execute_child

raise child_exception
OSError: [Errno 8] Exec format error

Answer №1

This particular error message...

OSError: [Errno 8] Exec format error

...indicates that the GeckoDriver binary being used is not formatted correctly.

The primary issue lies in the incompatibility between the binary format of the GeckoDriver and the Operating System it is running on.

Since you are running on a MacOS system, you will need to download geckodriver-v0.23.0-macos.tar.gz from mozilla/geckodriver, extract the files, and specify the absolute path of the GeckoDriver using the executable_path argument as shown below:

from selenium import webdriver

browser= webdriver.Firefox(executable_path='/path/to/geckodriver')

Answer №2

Here's a possible solution to the problem you're facing:
If you're seeing an error message like "Your Firefox profile cannot be loaded. It may be missing or inaccessible," the issue might be that Firefox 48.0 or higher is not compatible with Selenium 3.0.0 or newer versions.
To resolve this, make sure to update both your Selenium and geckodriver to the latest versions.

After updating, try running these basic commands:

from selenium import webdriver
from selenium.webdriver.common.keys import Keys

driver = webdriver.Firefox() 

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