Reboot into the Recovery HD by choosing the ‘Apple‘ menu > Restart, then hold down the ‘Command’ + R’ keys on the keyboard during the start up process. When you see the Apple Logo you can let go. When the machine boots you may have to choose your language then you will see the OS X Utilities screen. Select the Disk Utility and then select Continue. Then in Disk Utility select Macintosh HD in the left column (if there are two with that name or it is named something else choose the first indented item) and then Highlight your hard drive and on the right select the First Aid tab if it is not already selected, then click on Verify Disk on the far right. If that says “OK” in green type then select Repair Disk Permissions. If it is not ok let me know.
Ok can you plug it i to your network directly and then try resintall?
What year MacBook is it?
Do you have a time Machine Backup?
OK that would have saved you in this situation. You can boot from it and completely erase the whole device then reinstall and restore. We can still try to reinstall using it. Plug it in and then reboot holding Option then choose the backup to boot from. Choose Reinstall and then chose your internal drive to install on. It will only work if it is the same exact system version
No you are just reinstalling the same as you would using Recovery HD but there is something wrong with your Recovery partition. Hopefully the backup has the same exact version of the system. I can't stress enough the need to always keep that Time Machine backup up to date. You could of course also use Internet Recovery but then you lose everything except your old backup. That may be the case anyway but let's see.
I just did. You boot from it and then chose Reinstall same as you would using Recovery HD but if it is even one point different than the system now installed, i.e. 10.10.2 instead of 10.10.5 it won't work
Without a recent backup that's it. You can still try the TM resinall it may take you back to the two month old system version or it may say you can't do it, either way your files should be intact but since I can't be sure what is wrong there is no guarantee with any of these methods. If you are satisfied, please kindly provide an OK or Above Rating - so I get paid. Keep in mind you can always come back to this page at any time regarding this question. If we solved your problem, giving me high marks on the survey and / or bonuses are also GREATLY appreciated. Thanks!!