i am writing this again as really m getting much tired after installation of mavericks 10.9.4, a major issue with me is that some time my machine boot some time not ... most of the time i have to run Myfix and succeeded almost three times to boot the osx, every time after shutting down i cant boot again except running MyHack
to day morning when i started system again it stuck after few seconds on gray screen with apple logo.
other issues are
WiFi not working - system says airport installed
cant sign in app store
i did not check much due to booting difficulties
System Specs E6410 - i7 cpu M620 , 2.67GHz: ACPI x86 based PC- intel 5 series/3400 chipset family Intel hd graphics NVIDIA NVS 3100M 512MB gDDR3
Network Adapter: intel 82577LM Gigabit Network and Intel centrino Ultimate -N6300 AGN
osx version Mavericks 10.9.4...
please help as i have spent more less 5 days and each day more than 10 hrs to solving this issue , kindly note that i am new on mac osx i never use before so please define me in brief.....