Facetime on iMac crashing after updating to OSX Yosemite

Question

I'm unable to open face time after installing OSX Yosemite. I keep getting "Face Time quit unexpectedly" message along with this
Path:                  /Applications/FaceTime.app/Contents/MacOS/FaceTime
Identifier:            com.apple.FaceTime
Version:               3.0 (2142)
Build Info:            FaceTime-2142000000000000~6
Code Type:             X86-64 (Native)
Parent Process:        ??? [1]
Responsible:           FaceTime [616]
User ID:               501
Date/Time:             2014-10-24 23:07:48.618 -0700
OS Version:            Mac OS X 10.10 (14A389)
Report Version:        11
Anonymous UUID:        3DD7D1CA-487B-A126-D901-006E11EEBFEC
Time Awake Since Boot: 1200 seconds
Crashed Thread:        0  Dispatch queue: SharedAddressBook
Exception Type:        EXC_CRASH (SIGABRT)
Exception Codes:       0x0000000000000000, 0x0000000000000000
Application Specific Information:
*** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<__NSDictionaryM 0x60000024c960> valueForUndefinedKey:]: this class is not key value coding-compliant for the key icloud.com.'
terminating with uncaught exception of type NSException
abort() called
Application Specific Backtrace 1:
0   CoreFoundation                      0x00007fff8690a64c __exceptionPreprocess + 172
1   libobjc.A.dylib                     0x00007fff890a36de objc_exception_throw + 43
2   CoreFoundation                      0x00007fff8690a1e9 -[NSException raise] + 9
3   Foundation                          0x00007fff8de9a5ed -[NSObject(NSKeyValueCoding) valueForUndefinedKey:] + 226
4   Foundation                          0x00007fff8ddb7e68 -[NSObject(NSKeyValueCoding) valueForKey:] + 385
5   Foundation                          0x00007fff8ddd227e -[NSDictionary(NSKeyValueCoding) valueForKey:] + 143
6   CallHistory                         0x00000001073edb9d __59-[CHSharedAddressBook fetchAddressBookInfoFromCacheForKey:]_block_invoke + 62
7   libdispatch.dylib                   0x00007fff877a9c13 _dispatch_client_callout + 8
8   libdispatch.dylib                   0x00007fff877aae5e _dispatch_barrier_sync_f_invoke + 57
9   CallHistory                         0x00000001073d6608 -[CHSynchronizable executeSync:] + 67
10  CallHistory                         0x00000001073edab9 -[CHSharedAddressBook fetchAddressBookInfoFromCacheForKey:] + 189
11  CallHistory                         0x00000001073e9bf4 -[CHRecentCall fetchAndSetAddressBookIdsSync] + 141
12  CallHistory                         0x00000001073ea07a -[CHRecentCall addressBookRecordIdSync] + 42
13  CallHistory                         0x00000001073e8d1c __30-[CHRecentCall coalescingHash]_block_invoke + 61
14  libdispatch.dylib                   0x00007fff877a9c13 _dispatch_client_callout + 8
15  libdispatch.dylib                   0x00007fff877aae5e _dispatch_barrier_sync_f_invoke + 57
16  CallHistory                         0x00000001073d6608 -[CHSynchronizable executeSync:] + 67
17  CallHistory                         0x00000001073e8c4e -[CHRecentCall coalescingHash] + 178
18  CallHistory                         0x00000001073dafe3 -[CHManager coalesceCalls:] + 654
19  CallHistory                         0x00000001073dbc33 -[CHManager fetchRecentCallsSyncWithCoalescing:] + 798
20  CallHistory                         0x00000001073d67af __42-[CHSynchronizable executeSyncWithResult:]_block_invoke + 16
21  libdispatch.dylib                   0x00007fff877a9c13 _dispatch_client_callout + 8
22  libdispatch.dylib                   0x00007fff877b35f7 _dispatch_barrier_sync_f_slow + 757
23  CallHistory                         0x00000001073d66f5 -[CHSynchronizable executeSyncWithResult:] + 208
24  CallHistory                         0x00000001073db213 -[CHManager recentCalls] + 86
25  FaceTime                            0x000000010721e024 FaceTime + 102436
26  FaceTime                            0x000000010721defa FaceTime + 102138
27  FaceTime                            0x000000010721dc64 FaceTime + 101476
28  FaceTime                            0x0000000107223edf FaceTime + 126687
29  AppKit                              0x00007fff843aa0d9 -[NSIBObjectData nibInstantiateWithOwner:options:topLevelObjects:] + 1276

Answer 1

Please test after taking each of the following steps. Back up all data before you begin.
Step 1
Quit the Contacts or Address Book application if it's running.
Triple-click anywhere in the line of text below on this page to select it:
~/Library/Caches/com.apple.AddressBookSourceSync
Right-click or control-click the highlighted line and select
          Services ▹ Reveal in Finder (or just Reveal)
from the contextual menu.* A folder should open with an item selected. Move the selected item to the Trash.
Repeat with this line:
~/Library/Containers/com.apple.AddressBook
*If you don't see the contextual menu item, copy the selected text to the Clipboard by pressing the key combination command-C. In the Finder, select
          Go ▹ Go to Folder...
from the menu bar and paste into the box that opens (command-V). You won't see what you pasted because a line break is included. Press return.
Step 2
If you use iCloud, uncheck the box marked Contacts in the iCloud preference pane. Press return to confirm, or click Keep on Mac in the dialog that opens.
If you synchronize contacts with any other network service, disable that synchronization in the Internet Accounts  preference pane.
Step 3
From the list of groups on the left side of the Contacts window, select All On My Mac. If that group doesn't exist or is empty, skip this step. Otherwise, from the menu bar, select
          File ▹ Export... ▹ Contacts Archive...
Save the exported archive to the Desktop.
Step 4
Quit Contacts. Reveal the following item in the Finder as you did in Step 1:
~/Library/Application Support/AddressBook
If you know when the problem started, and you can restore that folder from an earlier backup without losing any contacts, do so and test. Otherwise, move the folder to the Desktop, leaving the window open for now.
Step 5
Launch Contacts. Your contacts and groups will be gone. If you took Step 3, then double-click the file you created in that step and confirm that you want to import from it. Your contacts and groups will reappear.
Step 6
If you took Step 2, reverse it. Test. If the issue is resolved, delete the AddressBook folder and the archive file on the Desktop and close the open folder window.
Otherwise, quit Contacts again and put the AddressBook folder back where it was, overwriting the newer one that will have been created in its place.
Step 7
Go back to Step 3, but this time choose Export vCard... from the Export menu. Continue as in Steps 4-6. All contacts should be preserved, but you may lose some metadata such as group membership.