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Firefox can't be opened after you install it on a Mac - How to fix
Revision 76934:
Revision 76934 by heyjoni on
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How to install Firefox on your Mac when you see this error message: "Firefox.app can't be opened because the identity of the developer cannot be confirmed."
What to do if you see the error "Firefox.app can't be opened because the identity of the developer cannot be confirmed." after installing Firefox on your Mac.
Content:
{for win, linux}{warning}This issue applies to Mac devices only.{/warning}{/for}
Apple has introduced a security change to Mac OS X 10.9.5 which causes the error message '''Firefox.app can't be opened because the identity of the developer cannot be confirmed''' to appear when you try to install Firefox on your Mac.
Here are some steps you can take if you see this message:
=Option 1 - Recommended=
# Hold down the {key Control} key while clicking on the Firefox file.
# Click {menu Open} in the context menu.
# Click {button Open} in the following dialog window.
=Option 2 - Open Firefox through the System Preferences=
# Click on the Apple icon at the top left corner of your screen and open {menu System Preferences…}.
# Click on {menu Security & Privacy}, then the {menu General} tab.
# You'll see a message stating that the ''Firefox.app'' was blocked. Click on {button Open Anyway}:
#;[[Image:blocked firefox mac]]
{for win, linux}{warning}This issue applies to Mac devices only.{/warning}{/for}
When you [[How to download and install Firefox on Mac|download and install Firefox on your Mac]] you may see the error message, '''Firefox.app can't be opened because the identity of the developer cannot be confirmed''' when you try to open it.
Apple has made a security change to Mac OS X 10.9.5 which may cause this error and block you from using Firefox. Here are some steps you can take if this happens:
=Option 1 - Recommended=
# Hold down the {key Control} key while clicking on the Firefox icon.
# Click {menu Open} in the context menu.
# Click {button Open} in the following dialog window.
=Option 2 - Open Firefox through the System Preferences=
# Click on the Apple icon at the top left corner of your screen and open {menu System Preferences…}.
# Click on {menu Security & Privacy}, then the {menu General} tab.
# You'll see a message stating that the ''Firefox.app'' was blocked. Click on {button Open Anyway}:
#;[[Image:blocked firefox mac]]