How to downgrade to Mavericks?

I’m seeking downgrade advice because I’ve never downgraded my Mac before.
I’ve scoured the net and the forums for fixes (I’ve already tried turning off graphics switching, resetting SMC and PRAM, repairing the disk, turning Bluetooth off and on a dozen times a day, etc. etc.) but I think it is time to deal with the inevitable — it is time to downgrade.
I feel abandoned by Apple. My computer is not even that old (MacBook Pro Retina, Mid 2012) yet it seems that Apple did not bother to test Yosemite on this model at all judging from my own experience and those that I have read about online.
Yosemite complaints, in order of maximum frustration:
1) Apple’s lack of acknowledgement and updates to fix these problems.
2) Complete lockups 2-6 times per day (It’s like Windows!)
3) Bluetooth is unusable (BT mouse rarely works)
4) Graphics artifacts everywhere (worse than Mavericks)
5) Wifi not as good as Mountain Lion
6) Automatic graphics hardware switching causes lockups if turned on.
7) Won’t stay asleep (battery is 0% in the morning)
I never minded paying premium prices for Macs because my computer is my primary tool and I need (and expect) reliability. But this is reminiscent of my Windows experiences. I dumped Windows for Linux and then for Mac 13 years ago because I realized I was spending more time fixing my computer than actually using it.
So, for the first time, I’m seriously considering downgrading my Mac. My target is Mavericks even though the graphics artifacts in Mavericks were the reason I upgraded to Yosemite in the first place. I think that going back too far would be a problem since most of my software is up to date and was probably built with Yosemite in mind (I also want iCloud to keep working correctly).
I would like to hear from Mac users that successfully downgraded and what pitfalls they encountered.
Having said that, what is the best way to downgrade?
- Can I install Mavericks over top of Yosemite or do I have to wipe the machine clean and do a fresh install?
- Are there any complications with Time Machine backups?
- Does iCloud still work as expected?
- Can I preserve my application settings?
- Since I have a non-removable SSD, what's a good way to preserve my data if a I do a fresh install?
I am really dreading this, having to reinstall everything, and set up everything again. But, Yosemite is impacting my productivity.
My system specs:
OS X 10.10.1
MBP retina mid 2012
2.6 GHz Intel Core i7
16 GB 1600 MHz DDR3
NVIDIA GeForce GT 650M 1024 MB

I think the problem with Yosemite + rMBP mid 2012 is more fundamental than a mere software configuration issue. From what I've read even a clean install doesn't resolve the issues. That means it's not likely related to upgrade cruft. The newest rMBPs use different graphics hardware so I doubt that it's a high priority for Apple to make a machine they don't sell anymore run correctly. Having said that, I really want them to fix it because I like Yosemite and would prefer to stick with it. It's just that the need for reliability trumps everything else.
I ran EtreCheck, and posted the results below.
EtreCheck reports 'Good' Bluetooth status but the BT mouse in not working.
Problem description:
- Complete lockups 2-6 times per day (mouse pointer is usually movable)
- Bluetooth is unusable (BT mouse rarely works)
- Graphics artifacts
- Automatic graphics hardware switching causes lockups if turned on.
- Won’t stay asleep (wakes up and drains battery)
EtreCheck version: 2.1.6 (109)
Report generated January 24, 2015 at 5:06:00 PM EST
Download EtreCheck from http://etresoft.com/etrecheck
Click the [Support] links for help with non-Apple products.
Click the [Details] links for more information about that line.
Click the [Adware] links for help removing adware.
Hardware Information: ℹ️
MacBook Pro (Retina, Mid 2012) (Verified)
MacBook Pro - model: MacBookPro10,1
1 2.6 GHz Intel Core i7 CPU: 4-core
16 GB RAM Not upgradeable
BANK 0/DIMM0
8 GB DDR3 1600 MHz ok
BANK 1/DIMM0
8 GB DDR3 1600 MHz ok
Bluetooth: Good - Handoff/Airdrop2 supported
Wireless: en0: 802.11 a/b/g/n
Battery Health: Normal - Cycle count 287
Video Information: ℹ️
Intel HD Graphics 4000
NVIDIA GeForce GT 650M - VRAM: 1024 MB
Color LCD spdisplays_2880x1800Retina
System Software: ℹ️
OS X 10.10.1 (14B25) - Time since boot: 0:0:50
Disk Information: ℹ️
APPLE SSD SM512E disk0 : (500.28 GB)
EFI (disk0s1) <not mounted> : 210 MB
Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
Macintosh HD (disk1) / : 499.05 GB (79.56 GB free)
Core Storage: disk0s2 499.42 GB Online
USB Information: ℹ️
Apple Inc. FaceTime HD Camera (Built-in)
Apple Inc. Apple Internal Keyboard / Trackpad
Apple Inc. BRCM20702 Hub
Apple Inc. Bluetooth USB Host Controller
Thunderbolt Information: ℹ️
Apple Inc. thunderbolt_bus
Configuration files: ℹ️
/etc/sysctl.conf - Exists
/etc/hosts - Count: 2553
Gatekeeper: ℹ️
Anywhere
Kernel Extensions: ℹ️
/Applications/Elgato Video Capture.app
[not loaded] com.elgato.driver.Pluto2 (1.1) [Support]
/Applications/ExpanDrive.app
[not loaded] com.expandrive.filesystems.strongfuse (2.5.6 - SDK 10.6) [Support]
/Applications/Toast 11 Titanium/Spin Doctor.app
[not loaded] com.hzsystems.terminus.driver (4) [Support]
/Applications/Toast 11 Titanium/Toast Titanium.app
[not loaded] com.roxio.TDIXController (2.0) [Support]
/Library/Extensions
[loaded] at.obdev.nke.LittleSnitch (4234 - SDK 10.8) [Support]
[loaded] jp.plentycom.driver.SteerMouse (4.2.1 - SDK 10.6) [Support]
/System/Library/Extensions
[not loaded] com.3dconnexion.driver (1.7 - SDK 10.6) [Support]
[not loaded] com.roxio.BluRaySupport (1.1.6) [Support]
/Users/[redacted]/Library/Application Support/Transmit/Transmit Disk.app
[not loaded] com.panic.TransmitDisk.transmitdiskfs (4.0.0 - SDK 10.5) [Support]
Launch Agents: ℹ️
[running] at.obdev.LittleSnitchUIAgent.plist [Support]
[not loaded] com.adobe.AAM.Updater-1.0.plist [Support]
[loaded] com.cisco.anyconnect.gui.plist [Support]
[not loaded] com.maintain.LogOut.plist [Support]
[not loaded] com.maintain.PurgeInactiveMemory.plist [Support]
[not loaded] com.maintain.Restart.plist [Support]
[not loaded] com.maintain.ShutDown.plist [Support]
[not loaded] com.maintain.Sleep.plist [Support]
[running] com.maintain.SystemEvents.plist [Support]
[loaded] com.oracle.java.Java-Updater.plist [Support]
[loaded] org.macosforge.xquartz.startx.plist [Support]
Launch Daemons: ℹ️
[running] at.obdev.littlesnitchd.plist [Support]
[loaded] com.adobe.fpsaud.plist [Support]
[loaded] com.bombich.ccc.plist [Support]
[running] com.cisco.anyconnect.vpnagentd.plist [Support]
[loaded] com.cocoatech.pathfinder.SMFHelper7.plist [Support]
[failed] com.edb.launchd.postgresql-9.1.plist [Support]
[running] com.fitbit.galileod.plist [Support]
[not loaded] com.maintain.AutoLoginUserScreenLocked.plist [Support]
[not loaded] com.maintain.CocktailScheduler.plist [Support]
[not loaded] com.maintain.HideSpotlightMenuBarIcon.plist [Support]
[loaded] com.microsoft.office.licensing.helper.plist [Support]
[loaded] com.nullvision.noatime.plist [Support]
[loaded] com.oracle.java.Helper-Tool.plist [Support]
[loaded] com.oracle.java.JavaUpdateHelper.plist [Support]
[loaded] org.macosforge.xquartz.privileged_startx.plist [Support]
User Launch Agents: ℹ️
[loaded] com.adobe.ARM.[...].plist [Support]
[invalid?] com.valvesoftware.steamclean.plist [Support]
[running] ws.agile.1PasswordAgent.plist [Support]
User Login Items: ℹ️
SteerMouse Manager UNKNOWN (missing value)
Dropbox Application (/Applications/Dropbox.app)
Infovox iVox Updates Checker Application (/Applications/Infovox iVox Voice Manager.app/Contents/Resources/Infovox iVox Updates Checker.app)
SpeechSynthesisServer Application (/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks /SpeechSynthesis.framework/Versions/A/SpeechSynthesisServer.app)
BetterSnapTool Application (/Applications/BetterSnapTool.app)
Calendar Application (/Applications/Calendar.app)
SteerMouse Manager Application (/Applications/Utilities/SteerMouse.app/Contents/MacOS/SteerMouse Manager.app)
Internet Plug-ins: ℹ️
ChemDraw Plugin Pro: Version: 14 . 0 . 0 - SDK 10.6 [Support]
o1dbrowserplugin: Version: 5.4.2.18903 [Support]
Unity Web Player: Version: UnityPlayer version 3.5.2f2 - SDK 10.6 [Support]
Default Browser: Version: 600 - SDK 10.10
Flip4Mac WMV Plugin: Version: 3.2.0.16   - SDK 10.8 [Support]
Silverlight: Version: 5.1.30514.0 - SDK 10.6 [Support]
FlashPlayer-10.6: Version: 16.0.0.296 - SDK 10.6 [Support]
Flash Player: Version: 16.0.0.296 - SDK 10.6 Mismatch! Adobe recommends 16.0.0.287
QuickTime Plugin: Version: 7.7.3
googletalkbrowserplugin: Version: 5.4.2.18903 [Support]
SharePointBrowserPlugin: Version: 14.4.6 - SDK 10.6 [Support]
Mathematica: Version: 9.0.1.4092152 [Support]
EPPEX Plugin: Version: 4.1.0.0 [Support]
JavaAppletPlugin: Version: Java 8 Update 25 Check version
User internet Plug-ins: ℹ️
Google Earth Web Plug-in: Version: 7.1 [Support]
Safari Extensions: ℹ️
1Password [Installed]
AdBlock [Installed]
Better Pop Up Blocker-1 [Installed]
DuckDuckGo [Installed]
Auto Refresh [Installed]
3rd Party Preference Panes: ℹ️
3Dconnexion [Support]
Flash Player [Support]
Flip4Mac WMV [Support]
Java [Support]
Perian [Support]
PostgreSQL [Support]
SteerMouse [Support]
TeXDistPrefPane [Support]
Time Machine: ℹ️
Skip System Files: NO
Mobile backups: ON
Auto backup: YES
Volumes being backed up:
Macintosh HD: Disk size: 499.05 GB Disk used: 419.48 GB
Destinations:
Time Machine II [Local]
Total size: 999.37 GB
Total number of backups: 51
Oldest backup: 2013-07-01 18:15:07 +0000
Last backup: 2015-01-09 22:32:42 +0000
Size of backup disk: Too small
Backup size 999.37 GB < (Disk used 419.48 GB X 3)
Backups [Network]
Total size: 4.00 TB
Total number of backups: 39
Oldest backup: 2013-10-28 14:07:02 +0000
Last backup: 2015-01-21 07:48:29 +0000
Size of backup disk: Excellent
Backup size 4.00 TB > (Disk size 499.05 GB X 3)
Top Processes by CPU: ℹ️
      9% WindowServer
      9% cloudd
      2% Little Snitch Agent
      1% com.apple.WebKit.Networking
      1% hidd
Top Processes by Memory: ℹ️
275 MB mds_stores
120 MB Safari
103 MB Finder
103 MB Mail
86 MB Dock
Virtual Memory Information: ℹ️
12.46 GB Free RAM
2.84 GB Active RAM
617 MB Inactive RAM
1.25 GB Wired RAM
1.32 GB Page-ins
0 B Page-outs
Diagnostics Information: ℹ️
Jan 24, 2015, 05:05:25 PM Self test - passed

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Yosemite giving black screen, how to downgrade to mavericks externally

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why can't i downgrade to mavericks? i have got some problem with yosmite. i would like to downgrade to mavericks.please help me how to get it ? thanks

Hi here are a couple of links you may find useful, the first is if you have made a time machine backup, the second if you have not.
http://osxdaily.com/2014/10/22/downgrade-os-x-yosemite-to-mavericks/
http://www.macworld.co.uk/how-to/mac-software/revert-back-mavericks-from-yosemit e-3581872/

How to downgrade mavericks to mountain lion

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Hi hommakusee,
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http://support.apple.com/kb/PH14176
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How to downgrade back to Mavericks?

I upgraded my system to Yosemite the other night. I saw a lot of changes especially in style. I like the blurry background and the minimal logos BUT THE COLORS. Too colorful. The folder colors, too bright. I feel like this is the worst OS ever. My Macbook became slow as ****, I see the spinning wheel of death everywhere, everything loads so slow even the volume and brightness that pops when you press those buttons!
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Aiseruchan wrote:
I feel like this is the worst OS ever. My Macbook became slow as ****, I see the spinning wheel of death everywhere, everything loads so slow even the volume and brightness that pops when you press those buttons!
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Make sure you know what you have installed, and make sure all of it is up to date.
Two simple tests: Try booting into Safe Boot mode. Any better?
Try logging into a brand new user account. Any better?
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How do I downgrade to Maverick

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I decided to bite the bullet and downgrade to Maverick, but even that isn't going well. I tried the Command-R reinstall and it downloaded, but then gave me PAGES of errors...any ideas for another way to do this???

To downgrade to Mavericks requires you have a Mavericks installer because it cannot be downloaded from the App Store. Here's what you can try provided you have a model that supports Internet Recovery: Computers that can be upgraded to use OS X Internet Recovery. If yours is supported:
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Be sure you backup your files to an external drive or second internal drive because the following procedure will remove everything from the hard drive.
Boot to the Internet Recovery HD:
Restart the computer and after the chime press and hold down the COMMAND-OPTION- R keys until a globe appears on the screen. Wait patiently - 15-20 minutes - until the Recovery main menu appears.
Partition and Format the hard drive:
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Reinstall OS X: Select Reinstall OS X and click on the Install button. Be sure to select the correct drive to use if you have more than one.
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Clean Install of Snow Leopard
Be sure to make a backup first because the following procedure will erase
the drive and everything on it.
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Time Machine "inherit" after emergency downgrade to Mavericks

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I was having many kernel panics after upgrading to Yosemite. After thorough hardware diagnostics (no hardware problems), the Genius Bar guy suggested downgrading to Mavericks 10.9.5, which he did in the store by wiping the hard drive and installing 10.9.5.
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thanks!!!!
TL

Inherit a Backup
Inherit a Backup (2)

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You did not due any due dilligence to investigate if your legacy apps would run, you should upgrade your apps. However if you feel you have to downgrade back to SL then click
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OS X Mavericks: Erase and reinstall OS X
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