It seems to be constantly trying to display the main screen, failing, and trying again so that if I move my mouse it keeps resetting in the centre of the screen.
Screen does go black, but main screen never appears and occasionally during the "flicker" I can see windows from the Finder.
Had worked up until yesterday. Not aware of any OS updates.
Tried running from the command-line and gor the following message:
Terminal output wrote:2017-01-25 17:58:17.706 BZFlag[29578:57312178] 17:58:17.706 WARNING: 140: This application, or a library it uses, is using the deprecated Carbon Component Manager for hosting Audio Units. Support for this will be removed in a future release. Also, this makes the host incompatible with version 3 audio units. Please transition to the API's in AudioComponent.h.
BZFlag version: 220.127.116.1161010-MAINT-mac64xc721-SDL2
BZFlag protocol: 0221
OpenGL vendor: Intel Inc.
OpenGL version: 2.1 INTEL-10.14.73
OpenGL renderer: Intel Iris Pro OpenGL Engine
Depth Buffer: 24 bitplanes
LIBCURL version: libcurl/7.43.0 SecureTransport zlib/1.2.5
Hardware Overview wrote: Model Name: MacBook Pro
Model Identifier: MacBookPro11,2
Processor Name: Intel Core i7
Processor Speed: 2.2 GHz
Number of Processors: 1
Total Number of Cores: 4
L2 Cache (per Core): 256 KB
L3 Cache: 6 MB
Memory: 16 GB
Boot ROM Version: MBP112.0138.B17
SMC Version (system): 2.18f15
Serial Number (system): C02N5DVHG3QC
Hardware UUID: 6725C153-86FB-5164-8D3B-48B3B703200A
Tried deleting Application Support/BZFlag folder but it didn't help.