Q: boot very slow after installed Yosemite

Thanks for the suggestion iMacMiniBookPro! My mid-2010 13-inch MBP had the same problem: 30 seconds of blank screen before apple log and progress bar when starting up, followed by another 15 seconds. All this after upgrading to a fast SSD disk and 8 GB RAM (it was over a minute before the SSD and RAM upgrade). After finding your post here and resetting the MBP's PRAM, in the 15-second start-up ballpark.

I have a Macbook Pro Retina display latest version of 2014, 2.3 Quad -core i7 512 pcle flash storage (ssd) and i had the same problem after installing Yosemite. My mac used to boost up in 8sec and after the update , in 30-50sec. I did what you mention:

" Reply Helpfulby rssg on Oct 19, 2014 3:56 AM

Not sure if this may solve your problem, but I've come across this on one of the Macs here.

1. Open the disk utility, verify & repair disk permissions, verify & repair the disk if needed.
2. Restart the mac, hold down Option-Command-P-R to reset the PRAM. It should reboot again.

This helped the bad mac, and we appear to be back to normal.

On my other mac, I go from cold to logged-in within about 12 seconds (I run an SSD).   "

and we re back to normal. Thank you rssg

I don´t know if you´ve tried it yet, but the solution is:

System Preferences > Startup Disk, and select your boot disk (if it´s deselected).

That´s all.

Not sure what kind of advice this is, firstly, printer settings has nothing to do with the speed of which the system boots.

Secondly, this advice is just ridiculous and the comment looks like spam to me. Thirdly, the image shows no options that

SYNERGY so confidently described. BA BOOM.

Thanks synergy.  This corrected my slow boot problem.

This worked! It was taking 35 seconds from the time I pressed the Power button for my Macbook to load to the "Type password" screen. After reseting the printer it only takes 5 seconds. Thanks a bunch, buddy.

Note: I did not actually re-connect to the printer since I don't use it anymore. Seems to work either way.

My 2012 or so vintage Imac 20 inch all in one takes 10 to 30 min to boot.

I am a new mac user who is trying to teach myself some mac skills so I can better serve my customers.

I bought a used mac and the stupid guy who sold it to me reinstalled it with Yosemite. darn

Its a nice machine but useless the way it is. Any suggestions are much appreciated.

If I cannot get this solved through the forum, the machine is wasted hardware and money... so...

The way I see it I have two options if real Yosemite does not work....

I can reinstall Yosemite via the hackintosh build which is a much more forgiving version of the new mac OS designed for PC's that want to be a mac which would work flawlessly on real mac hardware and would permanently cure this problem...

or two... (which will make you all crazy)

Just get a copy of the new Win 10 and be done with the problem.

This is foolishness I have not seen in the business world and I am not a koolaid drinker or religious follower so I have no problems with this kind of sacrilege.

I certainly invite help and comment and even direct contact. My username works at yahoo

Thanks so much for any help you can provide...

My 2012 or so vintage Imac 20 inch all in one takes 10 to 30 min to boot.

I am a new mac user who is trying to teach myself some mac skills so I can better serve my customers.

I bought a used mac and the stupid guy who sold it to me reinstalled it with Yosemite. darn

Its a nice machine but useless the way it is. Any suggestions are much appreciated.

If I cannot get this solved through the forum, the machine is wasted hardware and money... so...

The way I see it I have two options if real Yosemite does not work....

I can reinstall Yosemite via the hackintosh build which is a much more forgiving version of the new mac OS designed for PC's that want to be a mac which would work flawlessly on real mac hardware and would permanently cure this problem...

or two... (which will make you all crazy)

Just get a copy of the new Win 10 and be done with the problem.

This is foolishness I have not seen in the business world and I am not a koolaid drinker or religious follower so I have no problems with this kind of sacrilege.

I certainly invite help and comment and even direct contact. My username works at yahoo

Thanks so much for any help you can provide...

II'm pretty sure your imac is still running on a normal Hard disk drive. Just buy an SSD and reinstall your yosemite there and your mac will boot in around 20 seconds. Or, buy a copy of Snow Leopard and reinstall it over your actual HDD. You'll be using an old OS though and the boot time won't be as performant as on an SSD. But your system is still better than mine where I am using a 2009 Mac amd with SSD upgrade it boots in just 35 seconds.

The problem is that the iMac does not boot at all...

it gets stuck in bootup and only occasionally will come up and work.

between 5 min and 30 min and sometimes never

I doubt windows 10 will help you. However I still think that might be a hard disk problem. If you can buy a very cheap one and try to replace it and see if that helps.

I find out today that even if I have an itunes or apple account I cannot log into Apple to download a new copy of Yosemite to reinstall the computer.

My only option is to rescue this mac with a win8 or XP machine... both of which have programs to read write format and set up boot parameters on a hard drive in Mac format.

I'll figure it out.

I think the easiest way around this is to set up a virtual mac on my HP envy 17 and use it to config a new hard drive.

Has anyone had any luck with putting a 2.5 in drive in a A1224 computer? I am considering using a 3.5 to 2.5 adapter and going small on this HD swap.

Thanks.

BEfore reinstalling from scratch, just clone your HD to another one, swap it and see how it runs. This will let you understand whe it is a faulty HD or a messy installation.

I studied and tried many of the suggestions in this thread, but it didn't help me much. Then I realized I had also a back-up of my previous system on a internal drive formatted as a startup drive. Soon as I erased this drive (after putting the back-up on an external drive which is not connected during start up) the problem was solved. My computer starts up from SSD lightning fast again! It seems that the system takes a lot of time to decide which system is the start up system. Maybe this is a bug in the system preferences, not remembering what is the start up disk (just guessing...).

Another thing to take into consideration is your RAM and how many items you have on your desktop. Your computer processes everything on your desktop at startup, Apple computers are not meant to have several items on the desktop.