Macbook Pro freeze after login (Yosemite)

My issue was manageable only having to reboot 3-5 times to get back up and running, however in the past 2 weeks its freezing anywhere, anytime.

After turning on it will freeze when I use finder, or safari, or the search bar will even freeze when trying to take a screenshot.

Really random as there is nothing happening in the background no applications open at all.

This isn't why I switched to Mac 12 years ago, If I wanted a machine that crashes I'd buy a Windows PC.

Thanks NoMoreFreezesPlease

Just used Onyx and so far so good. Only been back on for an hour, restarted the mac and started up first go.

The past week the freezing was getting worse, sometimes within a minute of turning on it would freeze up instantly.

After using Onyx and deliberately trying to have the issue recur I've had no issue.

This so far seems to be the solution.

Still no issues after installing Onyx.

Wakes from sleep with no issues, reboots OK, no freezing at all (so far)

Thanks again NoMoreFreezesPlease

OK so I spoke too soon did work without issue for 3 days.

Now back to its usual issue of freezing.

I am having the same problem. I restarted with command-R but the status bar got to 50% and then it went to a white blank page.

Over this weekend I saved all my docs, files, photos, applications and whatever else I could copy onto a separate hard drive in addition to the time machine backup. I did this because I want to be able to access my stuff without having to use time machine. I figure that if I resolve this issue without using time machine then that would mean that my time machine backup is affected also.

I setup keychain via iCloud so my passwords would be remembered.

I then deleted all my files that I had backed up off my macbook. All the stuff sitting on my desktop and in my documents all trashed and emptied. (I made sure that my docs were working on another mac first to ensure all info had been copied)

Then I did a new reinstall over the internet pressing command & option & R buttons on start up.

A clean install of Yosemite appears. I attached my backup drive and copied over iPhoto and it opens with all my photos.

So its been 1 day only but no freezing, no overheating, no random system shutdown.

Again Ive tried to replicate the issues by putting the macbook to sleep and waking etc.

So far its only been 1 day but no freezing, no overheating, no random system shutdown.

The same thing happened to me. The file vault is what screws your new mac up. I spent several hours in the apple store trying to get this fixed. i discovered I needed a software person from Apple and not the Genius (who just made things worse). I am up and running with file vault but am considering uninstalling it as it take up a LOT of space in memory.

Good Luck. Be patient. Apple is so much better than Windows. Apple needs to fix this file vault thing. It really stinks.

Yep!!!

Apple, please fix this nightmare.

You do not need to reinstall or downgrade. Follow these steps below:

The best way to correct this known issue is to Flash the PRAM. To do this, power the Mac off. Hold COMMAND+OPTION+P+R before and as you power on the Mac. Keep holding as you hear the chime, you will see the screen flash & restart. Release the four keys. Let it boot.

I have found this corrects the Apple loading bar, hanging and never loading the system. And also the issue of the password login screen. If flashing the PRAM does not correct the issue the first time, try it a second or third time. It will resolve these issues.

I use Yosemite on my office computer. I have noticed that I have to flash the PRAM every other day if I leave the computer on over night. If you shut down the computer when you are finished for the day, you should not encounter these annoying issues (This is after doing the PRAM flashing trick).

At least until, Apple release a fix...

PRAM is intermittent and somewhat ineffective at resolving the issue on my Mac.

I figured it might be FileVault related, so I rebuilt my directory DiskWarrior, that fixed it for 4 days. Then the issue returned. So far DiskWarrior has provided the best fix.

It also appears to be precipitated by drive access primarily. As soon as the login freeze happens, the other issue that comes along is a complete inability to launch applications / access dock items etc, however, if I'm working in an open application after everything else froze, it continues to work fine, that is unless I open an open/save window.

Actually, no.

PRAM is a term relating to Pre-Intel Macs. When you 'flash' the PRAM, or in this case, NVRAM (Non-volatile random access memory), you are clearing a cache of data that is storing information for the following (And more, but not listed here):

Startup disk

32-bit addressing

Virtual memory

RAM disk

Disk cache

For the issues I addressed with my fix (Non-responsive loading bar on cold boot & unable to login with Username/Password; "Pin Wheel for hours"), flashing the PRAM/NVRAM ( http://support.apple.com/en-us/HT204063 ) AND shutting the Mac when not using it for the day, will resolve the issue. I have over 30 Macs in my office, and six are running Yosemite. The six with Yosemite have all experienced the issue posted. All six have been resolved with my fix. Since November.

If my fix is not working for you, try flashing several times. By the third flash, the Mac loads on cold boot correctly and you can login.

*** If you are not flashing correctly, you will NOT see your Mac restart after the Chime, It will just continue to boot. A successful flash will sometimes show a spectrum of color (sometimes not) in vertical lines, on black, followed by an immediate soft boot & Chime. ***

Ive gone through most of the fixes listed and they do work for up to a week but then the issues keep coming back.

Ive just switched hard drives from an older mac book running osx and its having similar issues. Ive now put in a hard drive running lion so far so good.

My hard drive with Yosemite wont even boot up no matter what I try.

Does anyone think that it could be hardware related CPU, Graphics or Video perhaps causing the issues?

What you need to do with your HDD that has Yosemite, and will not boot:

Run the Disk Utility ( http://support.apple.com/en-us/HT201639http:// ), Verify & Repair permissions if the drive is not detected as damaged, and passes S.M.A.R.T.

You do not need to use an alternative HDD or downgrade the OSX, if you correct issues involving the corrupted HDD. Once you fix the disk using the Disk Utility, try the fix I posted.

OK so I can verify disk and repair disk however I cannot very or repair disk permissions they are not highlighted and cannot be selected. Any ideas?

I need the hard drive in the mac not as usb to get the permissions to highlight ill see if it will reboot now following your directions