It seems that Spotify is leaking file pointers/ports?
See attached screendump from Activity Monitor (Disk)
OS X Version 10.11.6 (15G19009)
Spotify Version 1.0.73.345.g6c9971ef
Output from open file and ports.
/
/Applications/Spotify.app/Contents/MacOS/Spotify
/Applications/Spotify.app/Contents/Frameworks/Chromium Embedded Framework.framework/Chromium Embedded Framework
/System/Library/Frameworks/CoreMIDI.framework/Versions/A/CoreMIDI
/System/Library/Frameworks/GameController.framework/Versions/A/GameController
/usr/lib/libexpat.1.dylib
/Applications/Spotify.app/Contents/Frameworks/Chromium Embedded Framework.framework/Resources/natives_blob.bin
/Applications/Spotify.app/Contents/Frameworks/Chromium Embedded Framework.framework/Resources/en.lproj/locale.pak
/Users/myuser/Library/Caches/com.spotify.client/Browser/GPUCache/data_0
/Users/myuser/Library/Caches/com.spotify.client/Browser/GPUCache/data_1
/Users/myuser/Library/Caches/com.spotify.client/Browser/GPUCache/data_2
/Users/myuser/Library/Caches/com.spotify.client/Browser/GPUCache/data_3
/Users/myuser/Library/Caches/com.spotify.client/Browser/Cache/data_0
/Users/myuser/Library/Caches/com.spotify.client/Browser/Cache/data_1
/Users/myuser/Library/Caches/com.spotify.client/Browser/Cache/data_2
/Users/myuser/Library/Caches/com.spotify.client/Browser/Cache/data_3
/usr/share/icu/icudt55l.dat
/System/Library/CoreServices/SystemAppearance.bundle/Contents/Resources/SystemAppearance.car
/private/var/folders/wh/lf32vc694f958yhyvnh4png80000gp/C/com.apple.scriptmanager2.le.cache
/System/Library/Fonts/Keyboard.ttf
/System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HIToolbox.framework/Versions/A/Resources/HIToolbox.rsrc
/Applications/Spotify.app/Contents/Frameworks/Chromium Embedded Framework.framework/Resources/icudtl.dat
/Applications/Spotify.app/Contents/Frameworks/Chromium Embedded Framework.framework/Resources/snapshot_blob.bin
/Applications/Spotify.app/Contents/Frameworks/Chromium Embedded Framework.framework/Resources/cef.pak
/Applications/Spotify.app/Contents/Frameworks/Chromium Embedded Framework.framework/Resources/cef_100_percent.pak
/Applications/Spotify.app/Contents/Frameworks/Chromium Embedded Framework.framework/Resources/cef_200_percent.pak
/Applications/Spotify.app/Contents/Frameworks/Chromium Embedded Framework.framework/Resources/cef_extensions.pak
/Applications/Spotify.app/Contents/Frameworks/Chromium Embedded Framework.framework/Resources/devtools_resources.pak
/System/Library/CoreServices/SystemAppearance.bundle/Contents/Resources/Assets.car
/System/Library/CoreServices/SystemAppearance.bundle/Contents/Resources/VibrantLightAppearance.car
/System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HIToolbox.framework/Versions/A/Resources/Extras2.rsrc
/System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vImage.framework/Versions/A/Libraries/libCGInterfaces.dylib
/System/Library/Fonts/SFNSText-Regular.otf
/System/Library/Fonts/SFNSDisplay-Regular.otf
/System/Library/Fonts/SFNSText-Bold.otf
/System/Library/Fonts/SFNSDisplay-Bold.otf
/System/Library/Keyboard Layouts/AppleKeyboardLayouts.bundle/Contents/Resources/AppleKeyboardLayouts-L.dat
/System/Library/Caches/com.apple.IntlDataCache.le.kbdx
/System/Library/Extensions/AppleIntelHD5000GraphicsMTLDriver.bundle/Contents/MacOS/AppleIntelHD5000GraphicsMTLDriver
/System/Library/Extensions/IOHIDFamily.kext/Contents/PlugIns/IOHIDLib.plugin/Contents/MacOS/IOHIDLib
/Users/myuser/Library/Caches/com.spotify.client/Browser/GPUCache/index
/Users/myuser/Library/Caches/com.spotify.client/Browser/Cookies
/Users/myuser/Library/Caches/com.spotify.client/Browser/Cache/index
/private/var/folders/wh/lf32vc694f958yhyvnh4png80000gp/C/mds/mdsDirectory.db
/private/var/db/mds/messages/se_SecurityMessages
/Library/Keychains/System.keychain
/System/Library/Keychains/SystemRootCertificates.keychain
/System/Library/Components/CoreAudio.component/Contents/MacOS/CoreAudio
/System/Library/Extensions/AppleHDA.kext/Contents/PlugIns/AppleHDAHALPlugIn.bundle/Contents/MacOS/AppleHDAHALPlugIn
/System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HIToolbox.framework/Versions/A/Resources/English.lproj/Localized.rsrc
/System/Library/Fonts/Helvetica.dfont
/private/var/folders/wh/lf32vc694f958yhyvnh4png80000gp/0/com.apple.LaunchServices-134502.csstore
/System/Library/Fonts/HelveticaNeueDeskInterface.ttc
/System/Library/PrivateFrameworks/DataDetectorsCore.framework/Versions/A/Resources/com.apple.datadetectorscore.cache.full.europe.system
/usr/share/langid/langid.inv
/usr/lib/dyld
/private/var/db/dyld/dyld_shared_cache_x86_64h
/dev/null
/dev/null
/dev/null
count=2, state=0x12
/System/Library/CoreServices/SystemAppearance.bundle/Contents/Resources/SystemAppearance.car
/Applications/Spotify.app/Contents/Frameworks/Chromium Embedded Framework.framework/Resources/icudtl.dat
/Applications/Spotify.app/Contents/Frameworks/Chromium Embedded Framework.framework/Resources/snapshot_blob.bin
/Applications/Spotify.app/Contents/Frameworks/Chromium Embedded Framework.framework/Resources/natives_blob.bin
/Applications/Spotify.app/Contents/Frameworks/Chromium Embedded Framework.framework/Resources/en.lproj/locale.pak
/Applications/Spotify.app/Contents/Frameworks/Chromium Embedded Framework.framework/Resources/cef.pak
/Applications/Spotify.app/Contents/Frameworks/Chromium Embedded Framework.framework/Resources/cef_100_percent.pak
/Applications/Spotify.app/Contents/Frameworks/Chromium Embedded Framework.framework/Resources/cef_200_percent.pak
/Applications/Spotify.app/Contents/Frameworks/Chromium Embedded Framework.framework/Resources/cef_extensions.pak
/Applications/Spotify.app/Contents/Frameworks/Chromium Embedded Framework.framework/Resources/devtools_resources.pak
count=0, state=0xa
->0xbd168c48d518eb3f
->0xbd168c48d51913bf
->0xbd168c48d518ed7f
->0xbd168c48d51912ff
count=0, state=0x8
/
/private/etc
/private/etc/hosts
count=0, state=0xa
->0xbd168c48d518ecbf
->0xbd168c48d518ebff
count=0, state=0xa
->0xbd168c48d518efbf
->0xbd168c48d518f1ff
/dev/urandom
->0xbd168c48d63bc0e7
/Users/myuser/Library/Caches/com.spotify.client/Browser/Visited Links
count=0, state=0xa
->0xbd168c48d5190fff
->0xbd168c48d51909ff
/System/Library/CoreServices/SystemAppearance.bundle/Contents/Resources/VibrantLightAppearance.car
/Users/myuser/Library/Application Support/Spotify/PersistentCache/Storage/index.dat
->0xbd168c48d51915ff
->0xbd168c48d519153f
/System/Library/CoreServices/SystemAppearance.bundle/Contents/Resources/Assets.car
localhost:4381
count=0, state=0xa
->0xbd168c48d519147f
->0xbd168c48d518ea7f
/System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HIToolbox.framework/Versions/A/Resources/Extras2.rsrc
->0xbd168c48d3dba9df
/Users/myuser/Library/Caches/com.spotify.client/Browser/GPUCache/index
/Users/myuser/Library/Caches/com.spotify.client/Browser/GPUCache/data_0
/Users/myuser/Library/Caches/com.spotify.client/Browser/GPUCache/data_1
/Users/myuser/Library/Caches/com.spotify.client/Browser/GPUCache/data_2
/Users/myuser/Library/Caches/com.spotify.client/Browser/GPUCache/data_3
/Users/myuser/Library/Caches/com.spotify.client/Browser/Cookies
/Users/myuser/Library/Caches/com.spotify.client/Browser/Cache/index
/Users/myuser/Library/Caches/com.spotify.client/Browser/Cache/data_0
/Users/myuser/Library/Caches/com.spotify.client/Browser/Cache/data_1
/Users/myuser/Library/Caches/com.spotify.client/Browser/Cache/data_2
/Users/myuser/Library/Caches/com.spotify.client/Browser/Cache/data_3
/Users/myuser/Library/Caches/com.spotify.client/Browser/Local Storage/leveldb/LOG
/Users/myuser/Library/Caches/com.spotify.client/Browser/Local Storage/leveldb/LOCK
/Users/myuser/Library/Caches/com.spotify.client/Browser/Local Storage/leveldb/MANIFEST-000001
*:57621
10.147.40.100:65110->144.64.199.104.bc.googleusercontent.com:https
[2001:420:44d3:1300:35bf:608a:db5f:d175]:53331->par10s33-in-x02.1e100.net:https
/Users/myuser/Library/Caches/com.spotify.client/Browser/Local Storage/leveldb/000005.ldb
*:65112
->0xbd168c48d63b9b67
/dev/urandom
*:65171
count=0, state=0x9
/Users/myuser/Library/Saved Application State/com.spotify.client.savedState/data.data
/Users/myuser/Library/Application Support/Spotify/PersistentCache/mercury.db
/Users/myuser/Library/Application Support/Spotify/PersistentCache/mercury.db-wal
/Users/myuser/Downloads
/Users/myuser/Downloads
/Users/myuser
count=0, state=0x9
/Users
->0xbd168c48d24eb277
count=0, state=0xa
->0xbd168c48dba26a3f
->0xbd168c48dba273ff
/Users/myuser/Library/Caches/com.spotify.client/Data/8a/8a58017465a6e36b9b00b94a0c638889b178d9a3.file
*:57621
count=0, state=0xa
->0xbd168c48e8fcedbf
->0xbd168c48e8fcecff
/System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HIToolbox.framework/Versions/A/Resources/English.lproj/Localized.rsrc
->0xbd168c48ed621977
->0xbd168c48ed621fb7
FNetwork.defaultStorageSession
/Users/myuser/Library/Saved Application State/com.spotify.client.savedState/windows.plist
/dev/random
[2001:420:44d3:1300:35bf:608a:db5f:d175]:53332->par10s33-in-x02.1e100.net:https
count=0, state=0xa
->0xbd168c48dba274bf
->0xbd168c48dba268bf
[2001:420:44d3:1300:35bf:608a:db5f:d175]:53339->par10s33-in-x02.1e100.net:https
10.147.40.100:53334->par10s33-in-f2.1e100.net:https
[2001:420:44d3:1300:35bf:608a:db5f:d175]:53351->par10s33-in-x06.1e100.net:https
10.147.40.100:53350->par21s03-in-f2.1e100.net:https
[2001:420:44d3:1300:35bf:608a:db5f:d175]:53353->par10s28-in-x0e.1e100.net:https
/Users/myuser/Library/Caches/com.spotify.client/Browser/Local Storage/leveldb/001555.ldb
[2001:420:44d3:1300:35bf:608a:db5f:d175]:53358->par10s33-in-x0e.1e100.net:https
[2001:420:44d3:1300:35bf:608a:db5f:d175]:53359->par10s33-in-x0e.1e100.net:https
/Users/myuser/Library/Caches/com.spotify.client/Browser/Local Storage/leveldb/001553.ldb
/Users/myuser/Library/Caches/com.spotify.client/Browser/Local Storage/leveldb/001556.log
/Users/myuser/Library/Caches/com.spotify.client/Browser/Local Storage/leveldb/001557.ldb
/Users/myuser/Library/Saved Application State/com.spotify.client.savedState/window_2.data
/System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HIToolbox.framework/Versions/A/Resources/HIToolbox.rsrc