Furthermore, for those who care, this is what my console returns when I try to load messages app:
4/14/16 10:57:46.504 AM Messages[1430]: schema version 9005
4/14/16 10:57:46.896 AM Messages[1430]: Unknown class SOExtendedTextField in Interface Builder file at path /Applications/Messages.app/Contents/Resources/ChatWindowAccountStatusView.nib.
4/14/16 10:57:46.897 AM Messages[1430]: Unknown class SOExtendedTextField in Interface Builder file at path /Applications/Messages.app/Contents/Resources/ChatWindowAccountStatusView.nib.
4/14/16 10:57:46.900 AM Messages[1430]: Failed to connect (_statusDelegate) outlet from (MyStatusControl) to (StatusController): missing setter or instance variable
4/14/16 10:57:46.900 AM Messages[1430]: *** Assertion failure in -[NSMenuItem initWithTitle:action:keyEquivalent:], /Library/Caches/com.apple.xbs/Sources/AppKit/AppKit-1404.46/Menus.subproj/NSMen uItem.m:402
4/14/16 10:57:46.901 AM Messages[1430]: Invalid parameter not satisfying: aString != nil
4/14/16 10:57:46.903 AM Messages[1430]: (
0 CoreFoundation 0x00007fff9a0b14f2 __exceptionPreprocess + 178
1 libobjc.A.dylib 0x00007fff9165df7e objc_exception_throw + 48
2 CoreFoundation 0x00007fff9a0b61ca +[NSException raise:format:arguments:] + 106
3 Foundation 0x00007fff8cff37d6 -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 198
4 AppKit 0x00007fff9c78f259 -[NSMenuItem initWithTitle:action:keyEquivalent:] + 155
5 Messages 0x00000001016545b1 iChatDefaultDefaults + 51449
6 Messages 0x00000001016492c5 iChatDefaultDefaults + 5645
7 Messages 0x0000000101648c4e iChatDefaultDefaults + 3990
8 CoreFoundation 0x00007fff9a027cef -[NSSet makeObjectsPerformSelector:] + 223
9 AppKit 0x00007fff9c786f2f -[NSIBObjectData nibInstantiateWithOwner:options:topLevelObjects:] + 1192
10 AppKit 0x00007fff9c8976ab -[NSNib _instantiateNibWithExternalNameTable:options:] + 677
11 AppKit 0x00007fff9c8972fb -[NSNib _instantiateWithOwner:options:topLevelObjects:] + 143
12 AppKit 0x00007fff9c896590 -[NSViewController loadView] + 270
13 Messages 0x00000001016685a7 TigerPrefNameForAccount + 59669
14 AppKit 0x00007fff9c803aaa -[NSViewController _loadViewIfRequired] + 75
15 AppKit 0x00007fff9c803a15 -[NSViewController view] + 30
16 Messages 0x00000001017d9edf FezVerifyCallHasErrors + 121777
17 Messages 0x0000000101667f3d TigerPrefNameForAccount + 58027
18 AppKit 0x00007fff9c80ced5 -[NSViewController _sendViewDidLoad] + 97
19 AppKit 0x00007fff9c803bbf -[NSViewController _loadViewIfRequired] + 352
20 AppKit 0x00007fff9c803a15 -[NSViewController view] + 30
21 Messages 0x00000001016668f5 TigerPrefNameForAccount + 52323
22 Messages 0x000000010166680a TigerPrefNameForAccount + 52088
23 Messages 0x000000010166677f TigerPrefNameForAccount + 51949
24 Messages 0x0000000101665ff8 TigerPrefNameForAccount + 50022
25 AppKit 0x00007fff9c82ea2b -[NSWindowController _windowDidLoad] + 592
26 AppKit 0x00007fff9c7cb542 -[NSWindowController window] + 110
27 Messages 0x00000001017cb00b FezVerifyCallHasErrors + 60637
28 Messages 0x00000001016653f9 TigerPrefNameForAccount + 46951
29 Messages 0x000000010173e893 FezCreateTrust + 37146
30 Foundation 0x00007fff8cf78f5e __NSThreadPerformPerform + 279
31 CoreFoundation 0x00007fff9a046881 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
32 CoreFoundation 0x00007fff9a025fbc __CFRunLoopDoSources0 + 556
33 CoreFoundation 0x00007fff9a0254df __CFRunLoopRun + 927
34 CoreFoundation 0x00007fff9a024ed8 CFRunLoopRunSpecific + 296
35 HIToolbox 0x00007fff8fad7935 RunCurrentEventLoopInMode + 235
36 HIToolbox 0x00007fff8fad776f ReceiveNextEventCommon + 432
37 HIToolbox 0x00007fff8fad75af _BlockUntilNextEventMatchingListInModeWithFilter + 71
38 AppKit 0x00007fff9c7baefa _DPSNextEvent + 1067
39 AppKit 0x00007fff9c7ba32a -[NSApplication _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 454
40 AppKit 0x00007fff9c7aee84 -[NSApplication run] + 682
41 AppKit 0x00007fff9c77846c NSApplicationMain + 1176
42 Messages 0x0000000101647bd1 main + 1717
43 libdyld.dylib 0x00007fff911d05ad start + 1
44 ??? 0x0000000000000001 0x0 + 1
)
And here is what my console returns when trying to open Mail:
4/14/16 11:00:42.182 AM Mail[1433]: Unknown class 'MailboxesSplitViewController', using 'NSObject' instead. Encountered in Interface Builder file at path /Applications/Mail.app/Contents/Resources/en.lproj/MessageViewer.nib.
4/14/16 11:00:42.182 AM Mail[1433]: Failed to connect (mailboxesContainer) outlet from (MessageViewer) to (NSView): missing setter or instance variable
4/14/16 11:00:42.182 AM Mail[1433]: Failed to connect (mailboxesSplitView) outlet from (MessageViewer) to (MailSplitView): missing setter or instance variable
4/14/16 11:00:42.182 AM Mail[1433]: Failed to connect (viewerContainer) outlet from (MessageViewer) to (NSView): missing setter or instance variable
4/14/16 11:00:42.183 AM Mail[1433]: Failed to connect (mailboxesContainer) outlet from (NSObject) to (NSView): missing setter or instance variable
4/14/16 11:00:42.183 AM Mail[1433]: Failed to connect (mailboxesSplitView) outlet from (NSObject) to (MailSplitView): missing setter or instance variable
4/14/16 11:00:42.403 AM Mail[1433]: NSDictionaryOfVariableBindings failed because either one of the values is nil, or there's something wrong with the way the macro is being invoked. Cannot assign value nil for key "fullScreenMinimizeTray". Keys:(
mailboxesSplitView,
fullScreenMinimizeTray
)