How to clean install Yosemite

How to clean install Yosemite on imac 10.9.5

Why?
Doing an erase and install of OS X is usually just a waste of time.
I recommend that you just upgrade and test it first.

Similar Messages

HT201475 clean install yosemite

Hello, I am looking for instructions on how to clean install Yosemite as the reviews on the apple store all say there are problems simply downloading the upgrade. I have 10.8.5 and need to know how to reformat disk and do a clean install. I have a time machine.
Thanks,

I had no problems with the Upgrade. People who have problems with just upgrading usually have system modifications installed that don't work with Yosemite.
If you install anything with an installer, you need to check for updates prior to upgrading your OS. If there aren't any updates available, you need to be prepared to uninstall that system mod if you run into problems.
Depending on how much junk you install on your Mac, erasing and installing might just be the best solution over updating the system mods.
To erase and install, you will need to boot into Recovery and erase the hard drive using Disk Utility. Then, Quit DU and reinstall the OS.
That will install Mavericks (10.8.5).
Note that things like iPhoto, iMovie, etc. are not part of the OS. You will need to either re-download them from the App Store or install from the DVDs that came with your Mac.
When the Setup Assistant runs during first boot, choose to Migrate from your Time Machine backup. https://support.apple.com/en-us/HT204350

How to get iPhoto and iTunes to a clean installed Yosemite from Time Machine

I wiped the Hard Drive and clean installed to OS X Yosemite. For Some reason, some of my Time Machine back ups disappeared or got deleted and it wasn't even full. I had back ups from 2011 and now it only starts from 2013 of June.
Next....when I try to restore my other apps(like iPhoto and my iTunes) I doesn't give that warp space effect in the background. It gives me the window layer effect but I just see the same mountain background on the desktop as the default Yosemite(unless thats how its suppose to look like that?) I can't restore using Time Machine because the little lines at the right are red (see screen shot) and it won't let me restore, and if i go back by using the arrows, if freezes. So,
I don't know how to install the old iTunes and iPhoto on my existing clean installed Yosemite from my Time Machine.
Can someone help me?

@ LarryHN Thank you ver much for you help I understand now that you just can't copy over the old library(got it)
I had the latest version of iPhoto before I cleaned installed.
The link you gave me was most informative and I want to thank you. But still problems arrive.
This came up and I don't know which one to pick

Instructions to clean install Yosemite to a fusion drive

Hi everyone this is Chris. I have recently purchased a new i mac 27 inch with a 1tb fusion drive. When i tried clean installing yosemite to the fusion drive i noticed that only the 1tb mechanical hard drive appeared. The 128gb ssd portion was missing and yes i checked in diskutil list but it is non existent. Also i noticed that logical volume partition was missing in disk utility so it looks like the yosemite install didnt also set up the ssd as i thought it would. I am attaching a screen shot of disk utility and diskutil list for reference. Could some one please help me with step by step instructions from booting the usb installer till the final installation. I am a new mac user and as such have little experience with the way the os and systems work. The reason i tried to clean install is because i like having control over everything running on my computer and i like to keep a clean system from the beginning. I am willing to learn just how mac osx functions so please help me learn how all these various software works on the i mac so i can use it as much as i did my old windows pc. Any help would be appreciated and thanks in advance.
Disk Utility screenshot 1
Disk Utility screenshot 2
Terminal window

I concur with Kappy, you do not have a Fusion Drive in that Mac.
You said; "The reason i tried to clean install is because i like having control over everything running on my computer and i like to keep a clean system from the beginning."
Personally I disagree with your reasoning for a so called "clean" install. Unlike Windows, if you install OS X just doing an upgrade, it does not have to same habit as the Windows installer which can load a PC with tons of crap.
My suggestion is to find out why your 128 GB SSD is not appearing rather then worrying about any "clean" installs.

Issues While Attempting to Clean Install Yosemite onto 2010 iMac 27"

Having a number of issues trying to clean install Yosemite onto a 2010 iMac 27.
The original 1TB HDD was about to die so I upgraded the hard drive to a Crucial SSD, via an Apple Authorized shop
Memory was also upgraded to 16GB (from the original 4GB)
The install process won't finish, as I get a disk error message from the computer
Since there's no fan control cable attached to the HDD anymore, the fan is on constantly (but I know this is a known / common issue so I will be fixing it via an app like HDD Fan Control)
The installation process keeps starting over
What is causing this installation issue? How can I fix and move forward?
Thanks in advance for help anyone can provide.

I've also tried an alternate method of installing - installing Yosemite onto an external hard drive then cloning this drive onto the SSD installed on the iMac. The computer keeps rebooting. This is the message that pops up. Growing increasingly frustrated. Is this a hardware issue related to the new SSD?

Clean Install Yosemite onto new SSD (Also, what is TRIM?)

Hi,
I've been researching how to replace the Hard Drive on my Late 2011 13inch Macbook Pro (MacBookPro8,1 / 2.4 GHz / Intel Core i5 / SATA III) with a new SSD (maybe a Samsung 840 EVO) and clean install Yosemite onto it. I've found a few ways to do this on the support forums and the macrumors forum, but I want to confirm if I can do it this way:
1. Plug new SSD into the Macbook via a USB cable
2. Download Yosemite onto current Macbook Hard Drive. When I'm prompted to install, chose the new SSD from the list. Complete Installation.
3. Remove old Hard Drive from Macbook and plug new SSD in it's place (and not in the optical bay).
Would this work? I have another external hard drive with all of my documents, pictures and music on which I'm just going to manually remove over, and have no problem doing. I can also download the iLife programs directly from the App Store so I wouldn't be missing out on those either (I do have the iLife '09 discs too). I've also read about creating a bootable USB using DiskMaker X, but I feel the route I outlined would be easier.
Am I missing anything? I do have the EFI Firmware v2.7, so the problems the 2011 MacBooks were having with SATA shouldn't be an issue during this. Also, during my research, I found a references to something called TRIM. Can someone explain TRIM to me?
Thanks,
Steve

Thanks for the response and confirming I can clean install Yosemite onto a new SSD using the process I listed in my initial post.
I have a 13'' MacBook Pro with Yosemite already installed onto it so my graphics card should be set. After almost a month of using it, I haven't noticed any issues on that end.
I guess this TRIM thing is a totally separate subject from this thread. I read Apple is no longer supporting third-party SSD for TRIM support. If you turn it on, but keep a security feature on, you risk your computer not booting correctly. It looks like the only way to have TRIM enabled on a SSD using Yosemite is to have an Apple supplied SSD, or an SSD that can trick Yosemite into thinking it's Apple supplied (like the Angelbird Wrk for Mac SSD).
I've also done a good amount of research that TRIM is only necessary if you're saving a lot of items to the hard drive in one sitting (like photoshop). I primarily use my Mac for Pages (which saves my documents into the cloud now), iTunes and Safari. I guess this would fit me into the "casual user' criteria? I've also read that if you don't use TRIM, your SSD uses "Garbage Collection" (which actually sounds terrible) to keep the SSD informed on what data can be overwritten since it's been deleted by the user. I read that most modern SSD hard drives have a pretty decent Garbage Collection function, so if you leave your computer idle, keep "Put the hard disk(s) to sleep when possible" unchecked, the SSD will run Garbage Collection on it's own and that should be sufficient enough to keep the SSD in good working order.

How to clean install Maverick

How to clean install maveraick back from Yosemite.

If you reinstall Mavericks, yes; unless you previously downloaded it from your Apple ID, you won't be able to install it.
If you reinstall the computer's original OS, no.
(125481)

Clean install yosemite, couldn´t install aperture afterwards

clean install yosemite, couldn´t install aperture afterwards

Hi, 2teddy3.
Thank you for visiting Apple Support Communities.
I would need more information regarding any errors received and clarification on exactly what is happening to provide a better answer. However, here is a troubleshooting article that may help. .
Troubleshooting the Mac App Store
http://support.apple.com/kb/TS3624
Cheers,
Jason H

Can you clean install Yosemite?

My iMac is becoming a bit sluggish so I would like to take the opportunity for a clean install with Yosemite. Can I clean install Yosemite as you could with Mavericks by using ctrl -R, erasing the hard drive, reformatting and then using internet recovery?
Late 2012 iMac
Currently on latest OSX Mavericks - OS X 10.9.5 (13F34)

Rather than an unnecessary clean install answer some questions about the slowness to see if we can determine what is causing the problem. What exactly is slowing down, booting, a application or applications, which ones, etd.?
Download and run Etrecheck. Copy and paste the results into your reply. It's a diagnostic tool that was developed by one of the most respected users here in the ASC to help identify the more obvious culprits.

Clean install Yosemite stuck at terms and conditions on MacBook Pro

Hello,
I'm clean installing Yosemite on my MacBook Pro, which I downloaded from the app store and booted from the recovery partition
The install has gone fine, but it is now stuck at the 'Terms and Conditions' window - it looks like it's trying to load the terms and conditions, but all I have is the spinning disk and 'agree' and 'back' are greyed out
It's been that way for over twenty minutes
Anyone got any ideas? Is it safe to hard-reset and see if it clears it next time?
Thanks,
Wes

Try the enter key.

Can't clean install Yosemite to 3rd party SSD in 2008 MBP

Hi all.
I'm a longtime lurker, first time poster. I seem to have really stymied myself with trying to upgrade my ol' reliable MBP.
My machine:
Late 2008 15" MacBook Pro
2.4Ghz Core 2 Duo
4GB RAM (3rd party Crucial, 2 matching 2GB sticks - it originally shipped with 2 1GB sticks, I upgraded it around 2 years ago)
120GB SSD (3rd party OCZ Agility III, it originally shipped with a 500GB Hitachi HDD - I've just installed this and am trying to use it)
No optical drive (it broke years ago)
Here is what I've done so far:
Removed the 500GB HDD and inserted the 120GB SSD
Created a bootable USB stick with the Yosemite installer on it
Booted from said USB stick and used Disk Utility to format the SSD with a GUID partition table, with 1 HFS+ (Journaled) formatted partition
Begun the Yosemite installer
The progress bar crawled for about 3 hours until it got about halfway, then it failed out with an error. Unfortunately I stupidly don't have a copy of the error logs
Booted from the USB stick again
Now the SSD does not show up at all in Disk Utility and I am not given the option of it when attempting to install Yosemite - so I can't reformat the drive or attempt another install
I have tried to run the Apple Hardware Test (to see if there are any problems with the RAM that might have triggered the error installing Yosemite), but unfortunately this does not seem possible on my machine. Since it is a late 2008 model with no optical drive, from the research I've done there seems to be no way I can run it. It can't do an Internet Hardware Test, and the 'trick' of holding F2 during bootup won't work because apparently you need to have the original shipping OS installed. From memory this machine shipped with Leopard - the OS on my old 500GB HDD is Snow Leopard however.
Does anyone have any ideas for what I can do next here? My goal is simply to do a clean install of Yosemite onto my SSD. I'm at a bit of a loss, especially since the SSD isn't even showing up in Disk Utility now.
An additional detail: There isn't anything in the slot where the optical drive should be. 2 years ago I opened my machine and removed it, replacing it with a 2.5" 'optibay' drive caddy. Unfortunately it was a pretty cheap caddy and it never functioned properly, so I removed it before beginning the above process. There is just an empty space now inside the machine, since I threw away my old broken optical drive years ago. I don't know if this may also be causing problems.
Many thanks for any and all assistance!

Thanks for responding Leopardus.
I tried holding Cmd+R at startup last night, but unfortunately all I got is a flashing folder with a question mark on it, presumably indicating that it can't find any files.
Internet Recovery is unfortunately not possible on my computer, I believe this feature was only included with Macs that shipped with Lion or later versions of OS X (mine shipped with Leopard).
The problem in the thread that you linked seems a bit different to mine - I think the core issue for me is that the SSD is now not recognised at all by Disk Utility, meaning I cannot even format it to try installing again.
Does anyone have any suggestions as to how I can access this 'invisible' SSD? I am considering buying a USB to SATA cable and connecting it to a friend's Mac.

Clean install yosemite

How do I do a clean install of Yosemite?

Problem description:
Frequent crashes after clean install of Yosemite on 2009 iMac
EtreCheck version: 2.0.11 (98)
Report generated December 3, 2014 at 5:10:15 PM PST
Hardware Information: ℹ️
iMac (24-inch, Early 2009) (Verified)
iMac - model: iMac9,1
1 3.06 GHz Intel Core 2 Duo CPU: 2-core
4 GB RAM Upgradeable
BANK 0/DIMM0
2 GB DDR3 1067 MHz ok
BANK 1/DIMM0
2 GB DDR3 1067 MHz ok
Bluetooth: Old - Handoff/Airdrop2 not supported
Wireless: en1: 802.11 a/b/g/n
Video Information: ℹ️
NVIDIA GeForce GT 130 - VRAM: 512 MB
iMac 1920 x 1200
System Software: ℹ️
OS X 10.10.1 (14B25) - Uptime: 2:43:6
Disk Information: ℹ️
WDC WD1001FALS-40K1B0 disk0 : (1 TB)
S.M.A.R.T. Status: Verified
EFI (disk0s1) <not mounted> : 210 MB
Macintosh HD (disk0s2) / [Startup]: 999.35 GB (982.39 GB free)
Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
OPTIARC DVD RW AD-5670S
USB Information: ℹ️
Seagate Backup+ Desk 3 TB
S.M.A.R.T. Status: Verified
EFI (disk1s1) <not mounted> : 315 MB
Big Backup 3TB (disk1s2) /Volumes/Big Backup 3TB : 3.00 TB (2.89 TB free)
Apple Inc. Built-in iSight
Apple, Inc. Keyboard Hub
Apple Inc. Apple Keyboard
Seagate BUP Slim SL 1.5 TB
S.M.A.R.T. Status: Verified
EFI (disk2s1) <not mounted> : 210 MB
Time Machine Backups (disk2s2) /Volumes/Time Machine Backups : 1.50 TB (1.37 TB free)
Mitsumi Apple USB Mouse
Broadcom Corp BCM2046A
Apple Computer, Inc. IR Receiver
Gatekeeper: ℹ️
Mac App Store and identified developers
Launch Daemons: ℹ️
[loaded] com.microsoft.office.licensing.helper.plist Support
User Launch Agents: ℹ️
[loaded] com.google.keystone.agent.plist Support
User Login Items: ℹ️
iTunesHelper Application (/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)
Internet Plug-ins: ℹ️
AdobePDFViewerNPAPI: Version: 11.0.09 - SDK 10.6 Support
SharePointBrowserPlugin: Version: 14.4.6 - SDK 10.6 Support
AdobePDFViewer: Version: 11.0.09 - SDK 10.6 Support
QuickTime Plugin: Version: 7.7.3
Default Browser: Version: 600 - SDK 10.10
3rd Party Preference Panes: ℹ️
None
Time Machine: ℹ️
Auto backup: YES
Volumes being backed up:
Macintosh HD: Disk size: 999.35 GB Disk used: 16.95 GB
Destinations:
Time Machine Backups [Local]
Total size: 1.50 TB
Total number of backups: 13
Oldest backup: 2014-11-27 15:05:24 +0000
Last backup: 2014-12-04 01:03:58 +0000
Size of backup disk: Adequate
Backup size 1.50 TB > (Disk used 16.95 GB X 3)
Top Processes by CPU: ℹ️
      8% mds
      4% WindowServer
      0% fontd
      0% Google Chrome
      0% ps
Top Processes by Memory: ℹ️
210 MB Google Chrome
99 MB WindowServer
86 MB Microsoft Outlook
86 MB Google Chrome Helper
82 MB mds_stores
Virtual Memory Information: ℹ️
116 MB Free RAM
1.85 GB Active RAM
1.73 GB Inactive RAM
606 MB Wired RAM
1.83 GB Page-ins
82 KB Page-outs

How do I install Yosemite on a 2nd HDD I have added and have the Mac Pro boot from the new HDD?

My MacPro's HD seems to be failing. None of the tests I run indicate that, but I get constant spinning balls and everything takes a long time. I bought a 2nd HDD and installed it in the 2nd bayou my Early 2009 Mac Pro. I formatted it and want to install Yosemite and have the Mac boot off the new drive. It is currently running OS X 10.9.5. When I go to update to Yosemite it begins to download. Will it give me the option of which drive to install on? Or will it just upgrade the original Mac's HD?

A Samsung 850 EVO 128GB SSD $75 now and makes a huge improvement. But get the 250GB which is $99. 500GB $199
Wish you asked us first Awesome prices and performance.
Output from Etrecheck is an easy "quick check" of what your system is carrying around and what baggage it has.
Move data to a 'data and media library" drive.
Use CCC to skip the user data folders except ~/Library and clone to SSD
And might want to save the installer .ESD package for use as clean installer and to be able to boot from.

How to Clean Install but then retrieve & restore my Keychain and Mailboxes.

For months now, there have been a large number of irritating problems with my system - and I'm not enough of a techie to resolve them.
It is as though my machine is stuck in the past.
Spotlight doesn't index well - and fails to find up to two thirds of my files - including most of the newer ones.
Dashboard remains at the point at which I upgraded my disk drive. I know this, because a clip from Safari (a web-page with drives for sale) comes up - laboriously slowly - every time I open dashboard; when I delete the clip, it simply reappears the next time I open dashboard after a reboot. Similarly, post-it-style notes made in the Stickies app just vanish after a reboot.
When I open TextEdit, the same untitled file I was working on back in the early summer opens with it; I close it, it's back again the next time I open TextEdit. Alterations I make to Text substitution disappear the moment I close the panel.
All new bookmark additions to Safari vanish from my bookmarks when I restart Safari.
Every time I open iTunes, it thinks I am opening it for the first time. I can't tell you how many times I have agreed to their Software License.
My iCal alarms go off ad infinitum even when I turn them off and for months after the event in question.
And so on, and so on. It's like living with an Alzheimer's patient who keeps asking you what day it is.
I have twice reinstalled Snow Leopard (and rebooted my way through all those software updates) to no avail. My system - or at any rate my applications - still think it's early summer 2010 and any changes since then are forgotten; and Spotlight continues to be virtually useless.
It seems intuitive that some of these problems might be associated with individual preference files and caches for the various applications. But, even if I knew how to correct such problems, I'm concerned it might take me days - even weeks - of messing around but without solving all of my problems.
I have to say, I am tired of having half a Macintosh at my disposal. And I'm inclined to do something drastic.
The obvious solution to these pernickety system problems is completely to reinstall Snow Leopard (onto an erased hard drive) and start from scratch. What has stopped me doing this so far is the fact that, together with the various keycodes that came with my applications, I would also lose all my e-mails and accounts from the Mail application - and all the various passwords in my Keychain.
Surely there must be some way to retrieve just these select items alone from backup after a clean install? (And - yes, techies - I KNOW that Apple doesn't offer a "clean install" these days but you know what I mean: I want to reset everything; then retrieve a few select items - but WITHOUT the complete migration - which would likely, in the process, reinstate all those corrupted preference files or permissions or whatever it is that is messing around with my machine's short term memory.)
So here's my question again:
How - following a "clean install" - do I locate and retrieve the specific ingredients that will restore my mailboxes and keychain to their current state, whilst leaving everything else "clean"?
Message edited by: Eric M Colvin
Message was edited by: Eric M Colvin

An alternative proposal I'm going to make is to set up a new user account. It seems highly likely to me that all, or almost all of these issues are related to the account preference files in ~/Library. Certainly the iTunes issue, Safari, TextEdit, iCal etc. suggest that your account is having trouble with saving any changes to its preference files which would result in anything you tried to do being forgotten the moment the application was closed.
So for a start, make a new account, log in to it and do a couple of experiments - make some bookmarks in Safari, change some TextEdit options, open iTunes - then close and reopen them, or even restart the machine. If the changes are saved, then it's definitely an account problem and there is no need to reinstall Mac OS. Worst case scenario then would be you might need to move your documents and settings over to the new account; however it's also worth taking a couple of steps to see if the original account can be fixed. Try the above step and if it works; if so, go to /Users and right click your home folder, then 'Get Info'. Under the section dealing with permissions, ensure that your username has both read and write permissions, then use the cogwheel to apply this setting to all folders and files inside your home folder (you may need to use your password to unlock the padlock for this).
There are other things that can be attempted even before moving to a new user (or reinstalling if the new user test failed) so it's still worth checking back here in case other people suggest steps, it just depends how much time you want to invest.
As always, back up all your data before troubleshooting.

How do I install Yosemite on a USB hard drive

I need to understand how to install Yosemite on a USB hard drive

Install it as normal, except that you select the USB drive when asked where you’d like to install it. The volume you’ll be putting it on needs to be formatted as Mac OS Extended (Journaled).
(115417)

How to clean install Yosemite

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