I have 4.3. I get a nice big Problem Report for Pages which I provide below for your reading pleasure!
It seems there is an image or image library missing, I am assuming removed or replaced when I updated to the new Pages etc apps.
Process: Pages [3364]
Path: /Applications/iWork '09/Pages.app/Contents/MacOS/Pages
Identifier: com.apple.iWork.Pages
Version: 4.3 (1048)
Build Info: Pages-10480000~1
Code Type: X86 (Native)
Parent Process: ??? [1]
Responsible: Pages [3364]
User ID: 501
Date/Time: 2016-12-20 11:25:13.742 +0900
OS Version: Mac OS X 10.12.2 (16C67)
Report Version: 12
Anonymous UUID: 588E9EBD-33B2-D46D-6C71-5E45A78092A4
Time Awake Since Boot: 490000 seconds
System Integrity Protection: enabled
Crashed Thread: 0
Exception Type: EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Exception Note: EXC_CORPSE_NOTIFY
Termination Reason: DYLD, [0x1] Library missing
Application Specific Information:
dyld: launch, loading dependent libraries
Dyld Error Message:
Library not loaded: @rpath/SFCompatibility.framework/Versions/A/SFCompatibility
Referenced from: /Applications/iWork '09/Pages.app/Contents/MacOS/Pages
Reason: image not found
Binary Images:
0x1000 - 0x354fe3 com.apple.iWork.Pages (4.3 - 1048) <3F2BE397-E81E-3355-C0DE-8B0F014E897B> /Applications/iWork '09/Pages.app/Contents/MacOS/Pages
0x4a1000 - 0x4dacb7 dyld (421.2) <B3CA3853-74FA-31A2-AFB3-B0C499268064> /usr/lib/dyld
0x519000 - 0x594ff7 com.apple.iLifeMediaBrowser (2.11.2 - 733) <05AE161A-586D-39CC-9C51-4A0990AC0186> /System/Library/PrivateFrameworks/iLifeMediaBrowser.framework/Versions/A/iLifeM ediaBrowser
Model: iMac14,2, BootROM IM142.0118.B14, 4 processors, Intel Core i5, 3.2 GHz, 32 GB, SMC 2.15f7
Graphics: NVIDIA GeForce GT 755M, NVIDIA GeForce GT 755M, PCIe, 1024 MB
Memory Module: BANK 0/DIMM0, 8 GB, DDR3, 1600 MHz, 0x02FE, 0x45424A3831554738454655352D474E4C2D46
Memory Module: BANK 1/DIMM0, 8 GB, DDR3, 1600 MHz, 0x02FE, 0x45424A3831554738454655352D474E4C2D46
Memory Module: BANK 0/DIMM1, 8 GB, DDR3, 1600 MHz, 0x02FE, 0x45424A3831554738454655352D474E4C2D46
Memory Module: BANK 1/DIMM1, 8 GB, DDR3, 1600 MHz, 0x02FE, 0x45424A3831554738454655352D474E4C2D46
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x111), Broadcom BCM43xx 1.0 (7.21.171.68.1a4)
Bluetooth: Version 5.0.2f4, 3 services, 27 devices, 1 incoming serial ports
Network Service: Ethernet, Ethernet, en0
Serial ATA Device: APPLE HDD ST1000DM003, 1 TB
USB Device: USB 3.0 Bus
USB Device: BRCM20702 Hub
USB Device: Bluetooth USB Host Controller
USB Device: FaceTime HD Camera (Built-in)
USB Device: USB2.0 Hub
USB Device: USB2.0 Hub
USB Device: MP980 series
USB Device: USB to ATA/ATAPI bridge
USB Device: Keyboard Hub
USB Device: Apple Keyboard
Thunderbolt Bus: iMac, Apple Inc., 23.10