try the install again, it should work now (and do nothing since you already did it)
tomatongs-Mac-mini:FreeTheJam tomatong$ /Users/tomatong/Documents/Cocos2d-x/sdkbox_installer/sdkbox import -b /Users/tomatong/Documents/Cocos2d-x/sdkbox-iap_v1.1.6.5.tar.gz
|______ | \ |____/ |] | | _/
| |/ | _ |] |____| _/ _
Copyright © 2015 Chukong Technologies Inc. v0.5.6.7
Installation already complete, no actions were taken
perfect. You should also have a log file in ~/.sdkbox/log
tomatongs-Mac-mini:FreeTheJam tomatong$ ls -al ~/.sdkbox/log
total 48
drwxr-xr-x 5 tomatong staff 170 Jul 19 00:11 .
drwxr-xr-x 3 tomatong staff 102 Jul 18 19:10 …
-rw-r–r-- 1 root staff 6468 Jul 18 19:10 sdkbox-log-2015-07-18
-rw-r–r-- 1 tomatong staff 7413 Jul 19 00:09 sdkbox-log-2015-07-19
-rw-r–r-- 1 tomatong staff 7835 Jul 19 00:11 sdkbox-log-2015-07-19-1
tomatongs-Mac-mini:FreeTheJam tomatong$
Thank a lot