Have you tried right clicking and choosing Open?
Might help if you also mentioned which App it is you're having trouble with.
I tried right click and open and it wont.
It's a patch file.
Here's the info.plist in package contents:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "
http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>CFBundleDevelopmentRegion</key>
<string>English</string>
<key>CFBundleDocumentTypes</key>
<array>
<dict>
<key>CFBundleTypeExtensions</key>
<array>
<string>*</string>
</array>
<key>CFBundleTypeName</key>
<string>NSStringPboardType</string>
<key>CFBundleTypeOSTypes</key>
<array>
<string>****</string>
</array>
<key>CFBundleTypeRole</key>
<string>Editor</string>
</dict>
</array>
<key>CFBundleExecutable</key>
<string>eyePatch</string>
<key>CFBundleIconFile</key>
<string>AppIcon</string>
<key>CFBundleIdentifier</key>
<string>org.Special-K.eyePatch</string>
<key>CFBundleInfoDictionaryVersion</key>
<string>6.0</string>
<key>CFBundleName</key>
<string>eyePatch</string>
<key>CFBundlePackageType</key>
<string>APPL</string>
<key>CFBundleShortVersionString</key>
<string>1.3.2</string>
<key>CFBundleSignature</key>
<string>SPLK</string>
<key>LSApplicationCategoryType</key>
<string>public.app-category.developer-tools</string>
<key>LSMinimumSystemVersion</key>
<string>10.0</string>
<key>NSMainNibFile</key>
<string>eyePatch</string>
<key>NSPrincipalClass</key>
<string>NSApplication</string>
<key>NSSupportsSuddenTermination</key>
<string>YES</string>
</dict>
</plist>