1. Restart your mac and hold Command+R until it boots in recovery mode
2. Click Dish Utility
3. Click your Macintosh HD and choose Erase in the upper menu and then choose Mac OS Journaled and then Erase to the right. This basically formats your HDD
4. Quit Disc Utility
5. Click Reinstall OS X (make sure that it has the Mavericks logo)
6. Follow instructions
Is it my internet problem or I erased some default file in my MacBook? (My PC run very smooth) though
Hold command-option-r while booting and this will get you into Internet Recovery.
Start Disk Utility and select the disk brand name at the very top (like Seagate 500GB or whatever) and erase the entire disk as Mac OS Extended.
Now quit Disk Utility and click reinstall OS. This will download the entire OS from Apple's servers and give you the same OS version that came with the machine.
Thank you very much for replying, trying to reinstall now.
By the way how do we stop macbook going to sleep cause it takes me fews hours to download and I need to head to bed now. I feel so sorry keep asking so much question, so sorry if I'm annoying and thank you so much for helping me.
hello i think i will have to reset mine to return it?
or just delete the apps is fine?
@did u fix it iamwilliam?
do u think i can't avoid the problem u had?
i will try this week but im scared to have ur problem and then can't fix it