Library directory structure in Mac

Below is list of directories and respective details as generally found in /Library/ directory of Mac.

Feel free to comment below if you find new directories (name and details).

/Library/:

  • /Library/Application Support/
    • /Library/Application Support/Adobe/
    • /Library/Application Support/App Store/
    • /Library/Application Support/Apple/
    • /Library/Application Support/ApplePushService/
    • /Library/Application Support/CrashReporter/
    • /Library/Application Support/GPGTools/
    • /Library/Application Support/GarageBand/
    • /Library/Application Support/LCTApp/
    • /Library/Application Support/Logic/
    • /Library/Application Support/Microsoft/
    • /Library/Application Support/Oracle/
    • /Library/Application Support/Paragon Software/
    • /Library/Application Support/ProApps/
    • /Library/Application Support/Script Editor/
    • /Library/Application Support/Tunnelblick/
    • /Library/Application Support/VMware/
    • /Library/Application Support/VirtualBox/
    • /Library/Application Support/Wireshark/
    • /Library/Application Support/com.apple.TCC/
    • /Library/Application Support/iLifeMediaBrowser/
  • /Library/Audio/
    • /Library/Audio/Apple Loops/
    • /Library/Audio/Apple Loops Index/
    • /Library/Audio/Impulse Responses/
    • /Library/Audio/MIDI Configurations/
    • /Library/Audio/MIDI Devices/
    • /Library/Audio/MIDI Drivers/
    • /Library/Audio/MIDI Patch/
    • /Library/Audio/Plug-Ins/
    • /Library/Audio/Sounds/
  • /Library/Caches/
    • /Library/Caches/ColorSync/
    • /Library/Caches/Desktop Pictures/
    • /Library/Caches/com.apple.cloudkit/
    • /Library/Caches/com.apple.iconservices.store/
    • /Library/Caches/com.google.SoftwareUpdate.0/
  • /Library/ColorPickers/
  • /Library/ColorSync/
    • /Library/ColorSync/Profiles/
  • /Library/Components/
  • /Library/Compositions/
  • /Library/Contextual Menu items/
  • /Library/CoreAnalytics/
  • /Library/CoreMediaIO/
    • /Library/CoreMediaIO/Plug-Ins/
  • /Library/Desktop Pictures/
    • /Library/Desktop Pictures/.localizations/
    • /Library/Desktop Pictures/.thumbnails/
    • /Library/Desktop Pictures/Solid Colors/
  • /Library/Developer/
    • /Library/Developer/CommandLineTools/
  • /Library/DirectoryServices/
    • /Library/DirectoryServices/PlugIns/
  • /Library/Documentation/
    • /Library/Documentation/Help/
    • /Library/Documentation/License.lpdf/
    • /Library/Documentation/User Information.localized/
  • /Library/DropboxHelperTools/
    • /Library/DropboxHelperTools/Dropbox_u501/
  • /Library/Extensions/
    • /Library/Extensions/ACS6x.kext/
    • /Library/Extensions/APExtFramebuffer.kext/
    • /Library/Extensions/ATTOCelerityFC8.kext/
    • /Library/Extensions/ATTOExpressSASHBA2.kext/
    • /Library/Extensions/ATTOExpressSASRAID2.kext/
    • /Library/Extensions/AirParrotDriver.kext/
    • /Library/Extensions/ArcMSR.kext/
    • /Library/Extensions/CalDigitHDProDrv.kext/
    • /Library/Extensions/HighPointIOP.kext/
    • /Library/Extensions/HighPointRR.kext/
    • /Library/Extensions/HuaweiDataCardDriver_10_9.kext/
    • /Library/Extensions/MBBUSBMassStorageDeviceClass.kext/
    • /Library/Extensions/PromiseSTEX.kext/
    • /Library/Extensions/SoftRAID.kext/
    • /Library/Extensions/TACC.kext/
  • /Library/Filesystems/
    • /Library/Filesystems/NetFSPlugins/
    • /Library/Filesystems/osxfuse.fs/
  • /Library/Fonts/
  • /Library/Frameworks/
    • /Library/Frameworks/iTunesLibrary.framework -> /System/Library/Frameworks/iTunesLibrary.framework
    • /Library/Frameworks/Libmacgpg.framework/
    • /Library/Frameworks/PluginManager.framework/
    • /Library/Frameworks/Python.framework/
    • /Library/Frameworks/NyxAudioAnalysis.framework -> /System/Library/PrivateFrameworks/NyxAudioAnalysis.framework
  • /Library/GPUBundles/
  • /Library/Google/
    • /Library/Google/GoogleSoftwareUpdate/
  • /Library/Graphics/
    • /Library/Graphics/Quartz Composer Plug-Ins/
  • /Library/Image Capture/
    • /Library/Image Capture/Automatic Tasks/
    • /Library/Image Capture/Devices/
    • /Library/Image Capture/Support/
    • /Library/Image Capture/Supports/
    • /Library/Image Capture/TWAIN Data Sources/
    • /Library/Image Capture/Tools/
  • /Library/Input Methods/
  • /Library/Internet Plug-ins/
    • /Library/Internet Plug-ins/AdobePDFViewer.plugin/
    • /Library/Internet Plug-ins/AdobePDFViewerNPAPI.plugin/
    • /Library/Internet Plug-ins/Disabled Plug-Ins/
    • /Library/Internet Plug-ins/JavaAppletPlugin.plugin/
  • /Library/Java/
    • /Library/Java/Extensions/
    • /Library/Java/JavaVirtualMachines/
  • /Library/Keyboard Layouts/
  • /Library/Keychains/
    • /Library/Keychains/SupplementalsAssets/
    • /Library/Keychains/crls/
  • /Library/LaunchAgents/
  • /Library/LaunchDaemons/
  • /Library/Logs/
    • /Library/Logs/CrashReporter/
    • /Library/Logs/DiagnosticReports/
    • /Library/Logs/Xsan/
  • /Library/Mail/
    • /Library/Mail/Bundles/
  • /Library/MessageTracer/
  • /Library/Messages/
    • /Library/Messages/PlugIns/
  • /Library/Modem Scripts/
  • /Library/OpenDirectory/
    • /Library/OpenDirectory/Mappings/
    • /Library/OpenDirectory/Modules/
    • /Library/OpenDirectory/Templates/
  • /Library/PDF Services/
    • /Library/PDF Services/Save to iCloud Drive.pdfworkflow/
    • /Library/PDF Services/Save to Web Receipts.pdfworkflow/
  • /Library/Perl/
    • /Library/Perl/X.XX
    • /Library/Perl/Updates/
  • /Library/PreferencePanes/
    • /Library/PreferencePanes/GPGPreferences.prefPane/
    • /Library/PreferencePanes/JavaControlPanel.prefPane -> /Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/lib/deploy/JavaControlPanel.prefPane
  • /Library/Preferences/
    • /Library/Preferences/Audio/
    • /Library/Preferences/DirectoryService/
    • /Library/Preferences/Logging/
    • /Library/Preferences/OpenDirectory/
    • /Library/Preferences/SystemConfiguration/
    • /Library/Preferences/VMware Fusion/
    • /Library/Preferences/Xsan/
  • /Library/Printers/
    • /Library/Printers/Canon/
    • /Library/Printers/EPSON/
    • /Library/Printers/Icons/
    • /Library/Printers/PPDs/
  • /Library/PrivilegedHelperTools/
  • /Library/Python/
    • /Library/Python/X.XX
  • /Library/QuickLook/
    • /Library/QuickLook/iBooksAuthor.qlgenerator/
    • /Library/QuickLook/iWork.qlgenerator/
  • /Library/QuickTime/
    • /Library/QuickTime/AppleIntermediateCodec.component/
    • /Library/QuickTime/AppleMPEG2Codec.component/
  • /Library/Receipts/
  • /Library/Ruby/
    • /Library/Ruby/Gems/
    • /Library/Ruby/Site/
  • /Library/Sandbox/
    • /Library/Sandbox/Profiles/
  • /Library/Screen Savers/
    • /Library/Screen Savers/Default Collections/
  • /Library/ScriptingAdditions/
  • /Library/Scripts/
    • /Library/Scripts/ColorSync/
    • /Library/Scripts/Folder Action Scripts/
    • /Library/Scripts/Folder Actions/
    • /Library/Scripts/Font Book/
    • /Library/Scripts/Printing Scripts/
    • /Library/Scripts/Script Editor Scripts/
    • /Library/Scripts/UI Element Scripts/
    • /Library/Scripts/VoiceOver/
  • /Library/Security/
    • /Library/Security/SecurityAgentPlugins/
    • /Library/Security/tokend/
  • /Library/Services/
    • /Library/Services/GPGServices.service/
  • /Library/Speech/
  • /Library/Speech/Synthesizers/
  • /Library/Spotlight/
    • /Library/Spotlight/iBooksAuthor.mdimporter/
    • /Library/Spotlight/iWork.mdimporter/
  • /Library/StagedExtensions/
  • /Library/StartupItems/
    • /Library/StartupItems/HWNetMgr/
    • /Library/StartupItems/HWPortDetect/
    • /Library/StartupItems/StartOuc/
  • /Library/SystemMigration/
    • /Library/SystemMigration/History/
    • /Library/SystemMigration/Queue/
  • /Library/SystemProfiler/
  • /Library/TeX/
    • /Library/TeX/.scripts/
    • /Library/TeX/Distributions/
  • /Library/Updates/
  • /Library/User Pictures/
    • /Library/User Pictures/Animals/
    • /Library/User Pictures/Flowers/
    • /Library/User Pictures/Fun/
    • /Library/User Pictures/Instruments/
    • /Library/User Pictures/Nature/
    • /Library/User Pictures/Sports/
  • /Library/Video/
    • /Library/Video/Plug-Ins/
    • /Library/Video/Professional Video Workflow Plug-Ins/
  • /Library/WebServer/
    • /Library/WebServer/CGI-Executables/
    • /Library/WebServer/Documents/
    • /Library/WebServer/share/
  • /Library/Widgets/Calculator.wdgt/
    • /Library/Widgets/Calendar.wdgt/
    • /Library/Widgets/Contacts.wdgt/
    • /Library/Widgets/Dictionary.wdgt/
    • /Library/Widgets/Movies.wdgt/
    • /Library/Widgets/Stickies.wdgt/
    • /Library/Widgets/Stocks.wdgt/
    • /Library/Widgets/Tile Game.wdgt/
    • /Library/Widgets/Unit Converter.wdgt/
    • /Library/Widgets/Weather.wdgt/
    • /Library/Widgets/Web Clip.wdgt/
    • /Library/Widgets/World Clock.wdgt/