A lot of problems after El Capitan then downgrade to Yosemite

Hello, I'm on a MacBook Pro (15 inch, early 2011), refurbished

2.2 GHz Intel Core 17

16 GB 1600 MHz DDR3

I have free out-f 859,48 GB 998,07 GB

SATA drive

(Barely) running on OS X Yosemite Version 10.10.5

This is a refurbished MacBook Pro, I bought a little over a year he has absolutely no problem until I tried the update of El Capitan a week ago.

First of all, the update took several hours during the night to download. He then took more than 14 hours to install. After completing the installation and reboot, the machine was apparently very well, but I had just surfed the web normally on Google Chrome.

The next day, shortly after turning on the machine, through a much faster startup and logon process and begins again to surf the web via Chrome, everything went haywire. The MacBook froze, I had a gray screen, then he crashed and died.

At this point, he refused to start as long as upward and rather stalled on the Apple logo screen white front. After I held down the power button to force it to turn off, wait a minute and turned off and on again, it starts only insofar as the logo screen of Apple with the progress bar and then hang. I tried to see if it would finally finish starting, no dice.

LONG VERSION:

I started to shoot trouble that all the typical El Capitan boot post fixed.

1. it will not Mode safe mode by holding the shift button on the start menu to the top. I have no active FileVault. I don't remember if I have a password for the updated firmware.

2. I was able to start it in recovery by using the command Mode + R while restarting - exactly ONCE. At that time, I used utilities and my external (passport for Mac) back to restore pre - El Capitan Yosemite. Still, things seemed good that night and I was able to use Chrome normally.

3. the next day, the same problems started upward, however, now it is no longer will enter into Recovery Mode. Yet once again, I would be stuck on the logo screen white front, or stuck on logo screen, or sometimes it would start through and then hang on the white screen again.

4. then, I tried to return the NVRAM on restart. This method sometimes works, sometimes not. Sometimes it again just hangs up on a part of the boot process.

5. I booted into single user mode and went through a series of troubleshooting commands. Yet once, it worked - exactly ONCE. For a while, it will boot into single user mode, most of the time, but following the instructions of before no results will be given.

6. I started in Restore Mode to Internet using the command + Option + r Repeat: it worked exactly ONCE. I was able to restore Yosemite 10.10.4, day 3, thought it was good, but no, crash, no initialization. None of the previous patches were working. Also, now command + R to start automatically in this mode and not in recovery mode. When the recovery of the Internet Mode ends, he hangs up on the white screen again and refuses to start.

I am more able to access Recovery Mode to use the utilities to erase the disc.

7. after resetting the SMC (Ctrl + Shift + option + command while holding the power button) AND the NVRAM, I am able to boot the computer and enter the Finder utilities and run the disc utilities. I ran all the permissions of the drive, I fixed all the permissions, I fixed the drive. On several occasions. Same things, I do much more than surf the web and it crashes. No startup. No Recovery Mode. Recovery mode Internet hangs up. Single User Mode is not given result. Also, I can no longer erase MacIntosh HD.

8. I use Time Machine to restore to my last backup. No dice. Same deal, as all of the above.

9. Finally, it does not restart after resetting the SMC and NVRAM again. I then upgraded to Yosemite 10.10.4 to 10.10.5. Now, I continue to have the same problems as above, but I can run is no longer Google Chrome or Spotify. With two apps, I get an immediate error message indicating "Chrome/Spotify has unexpectedly" until something starts at all.

10. I removed Chrome and tried to reinstall, same problem.

SHORT VERSION:

1. I've updated to El Capitan and the other day my MacBook Pro started to break and turn off, and then refuses to restart.

2. I have followed all directions on Apple's Support forums including attempt to boot mode without failure (fail). I could enter in Recovery Mode and restore an earlier version back up only ONCE. Now, it will restart is no longer into Recovery Mode.

3. I followed the instructions to start in single user Mode. It worked exactly ONCE.

4. I ran first aid utility disk and check/repair permissions and repair the disk several times. The problems persist.

5. I started in Internet Recovery Mode. It worked exactly ONCE, and now instead of normal Mode recover DΘmarrer to cmd + R, it goes right to the recovery of Internet Mode. Once that ends, it hangs indefinitely on the white screen, then sometimes it will go to a totally black screen indefinitely or close again.

6. I used the reset of the MSC and the NVRAM and managed to start completely. Then I upgraded to Yosemite 10.10.5 and lost my Chrome and Spotify. The MacBook continues to crash and stop randomly. Of the SMC + NVRAM reset seems to help with the start-up, but the crash then using that anything but Safari continues and reinstall still leads Chrome an instant "Chrome has unexpectedly" error message before it even begins.

The Mac came to me with Yosemite already installed and I have no disc to install it after a clean cloth. I am able to surf the web, and that's mostly it.

10.10 is saved on one archive, available from a backup Time Machine or in your App store purchases, there is no legal way to get more.

If you have disks that came with the computer as it is prior to recovery of the internet you can retrieve for that OS, but you are limited to the upgrade of the operating system in your App Store account. If you do not have this option is strictly 10.11.6

Tags: Mac OS & System Software

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