Laravel composer signal "11" error symfony osx -

anything try execute in laravel, minor files locally gives message in composer:

[symfony\component\process\exception\runtimeexception]
process has been signaled signal "11".

using osx 10.7.5

any appreciated, always.

for example :

composer update

typed in terminal retrieves error message above

make sure check composer cache folder has right permissions files , folders.

if ever ran composer sudo or root these cache folders have wrong root permissions.

look @ files , folders inside:

ll ~/.composer/cache/

Sp