Originally Posted by: Dickon Whitehead 
New Drawing which was not saved yet, I know I should know by now :-( .
Draw rectangle with fill
In Inspector select fill properties
Fill colour/More
Double click on any colour in pop-up swatch, 
Apple colour picker appears
Click on eyedropper
Move eyedropper outside of Viacad window / over desktop
Click on anything outside of Viacad
Crash!
Crash report available
Mac OS 10.14.5
 Hi Dickon,
I repeated your steps and got the same issue : CRASH. 
Process:               SharkCAD Pro 11 [58054]
Path:                  /Applications/SharkCAD Pro 11.app/Contents/MacOS/SharkCAD Pro 11
Identifier:            com.encore.sharkfxv11
Version:               11.0.0 (1400)
Code Type:             X86-64 (Native)
Parent Process:        ??? [1]
Responsible:           SharkCAD Pro 11 [58054]
User ID:               502
Date/Time:             2019-06-09 12:54:48.105 +0200
OS Version:            Mac OS X 10.14.5 (18F203)
Report Version:        12
Bridge OS Version:     3.5 (16P5200)
Anonymous UUID:        862CB787-B9B8-10DF-D531-81B8C3D1B368
Sleep/Wake UUID:       A877A34D-162E-4C46-8E03-A22CCB62625B
Time Awake Since Boot: 140000 seconds
Time Since Wake:       14000 seconds
System Integrity Protection: enabled
Crashed Thread:        0  Dispatch queue: com.apple.main-thread
Exception Type:        EXC_BAD_ACCESS (SIGSEGV)
Exception Codes:       KERN_PROTECTION_FAILURE at 0x00007ffeec88dc30
Exception Note:        EXC_CORPSE_NOTIFY
Termination Signal:    Segmentation fault: 11
Termination Reason:    Namespace SIGNAL, Code 0xb
Terminating Process:   exc handler [58054]
VM Regions Near 0x7ffeec88dc30:
    MALLOC_MEDIUM          00007fc7bf800000-00007fc7c0000000 [ 8192K] rw-/rwx SM=PRV  
--> STACK GUARD            00007ffeec88d000-00007ffeec88e000 [    4K] ---/rwx SM=NUL  stack guard for thread 0
    Stack                  00007ffeec88e000-00007ffeef88e000 [ 48.0M] rw-/rwx SM=SHM  thread 0
Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   libsystem_c.dylib             	0x00007fff655b3364 __xvprintf + 89
1   libsystem_c.dylib             	0x00007fff6558ae22 vfprintf_l + 54
2   libsystem_c.dylib             	0x00007fff65583bc5 fprintf + 160
3   libJS0GROUP.dylib             	0x0000000110255a78 CATError::Throw(char const*, int, void*) + 1144
4   libJS0GROUP.dylib             	0x0000000110265e63 CATSigHandler::Handler(int, __siginfo*, void*) + 1763
5   libsystem_platform.dylib      	0x00007fff656e9b5d _sigtramp + 29
6   ???                           	000000000000000000 0 + 0