Sudden lag/stutter in macbook Pro mid 2012

So I have a OSX Yosemite Mac with new SSD Harddrive and upgraded 16GB Ram.
Went on Holiday for a weekend and came back forgot to shut down the laptop so battery had died, recharged and ever since it is back up the whole computer has a 2second lag spike (only way I can describe it) while doing everything. While im typing this, sometimes it freezes and 1 or 2 seconds later the written text appears. While watching a video it will stutter and freeze only to continue 1 second after. While playing a game same stuttering appears.
The computer worked fine before the holiday so I don't know what has happened. No Updates needed, I reset the SMC but no improvement. It used to be super fast going to finder and different applications whereas now if I go into mail and click on a mailbox folder, sometimes the wheel of death appears and it takes 2 seconds to load and I have no explanation why.
Any help greatly appreciated as this is driving me insane.

Here is my etrecheck btw:
Problem description:
Macbook Pro all of a sudden running slow, 2 sec delay when doing every action
EtreCheck version: 2.0.11 (98)
Report generated 5 November 2014 18:15:11 GMT
Hardware Information: ℹ️
MacBook Pro (13-inch, Mid 2012) (Verified)
MacBook Pro - model: MacBookPro9,2
1 2.5 GHz Intel Core i5 CPU: 2-core
16 GB RAM 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: en1: 802.11 a/b/g/n
Video Information: ℹ️
Intel HD Graphics 4000 -
Color LCD 1280 x 800
System Software: ℹ️
OS X 10.10 (14A389) - Uptime: 2:15:49
Disk Information: ℹ️
Samsung SSD 840 EVO 250GB disk0 : (250.06 GB)
S.M.A.R.T. Status: Verified
EFI (disk0s1) <not mounted> : 210 MB
Solid State Hard Drive (disk0s2) / [Startup]: 249.20 GB (193.17 GB free)
Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
MATSHITADVD-R   UJ-8A8
USB Information: ℹ️
MOSART Semi. 2.4G Keyboard Mouse
Apple Inc. FaceTime HD Camera (Built-in)
Apple Computer, Inc. IR Receiver
Apple Inc. BRCM20702 Hub
Apple Inc. Bluetooth USB Host Controller
Apple Inc. Apple Internal Keyboard / Trackpad
Thunderbolt Information: ℹ️
Apple Inc. thunderbolt_bus
Gatekeeper: ℹ️
Mac App Store and identified developers
Launch Daemons: ℹ️
[loaded] com.adobe.fpsaud.plist Support
User Launch Agents: ℹ️
[loaded] com.genieo.completer.download.plist Support
[loaded] com.genieo.completer.ltvbit.plist Support
[loaded] com.genieo.completer.update.plist Support
User Login Items: ℹ️
None
Internet Plug-ins: ℹ️
FlashPlayer-10.6: Version: 15.0.0.189 - SDK 10.6 Support
Flash Player: Version: 15.0.0.189 - SDK 10.6 Support
QuickTime Plugin: Version: 7.7.3
Default Browser: Version: 600 - SDK 10.10
3rd Party Preference Panes: ℹ️
Flash Player Support
Time Machine: ℹ️
Mobile backups: OFF
Auto backup: NO - Auto backup turned off
Volumes being backed up:
Solid State Hard Drive: Disk size: 249.20 GB Disk used: 56.03 GB
Destinations:
My Passport Edge for Mac [Local]
Total size: 499.94 GB
Total number of backups: 1
Oldest backup: 2014-10-07 21:54:59 +0000
Last backup: 2014-10-07 21:54:59 +0000
Size of backup disk: Adequate
Backup size 499.94 GB > (Disk used 56.03 GB X 3)
Top Processes by CPU: ℹ️
      4% WindowServer
      1% loginwindow
      1% launchd
      0% AppleSpell
      0% SystemUIServer
Top Processes by Memory: ℹ️
69 MB Safari
69 MB Finder
52 MB loginwindow
52 MB mds_stores
52 MB com.apple.WebKit.WebContent
Virtual Memory Information: ℹ️
13.04 GB Free RAM
2.18 GB Active RAM
772 MB Inactive RAM
1.19 GB Wired RAM
1.37 GB Page-ins
0 B Page-outs

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From the Safari menu bar, select
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MacBook Pro mid 2012 15" - one RAM slot gone bad

Hi,
Has anyone ever had the issue with not working RAM slot? My MacBook Pro mid 2012 (non-retina) suddenly froze and after restart was beeping three times every few seconds. I found out that the beeping signals bad RAM. Bought new chips, and the problem still exists. My mac can now run on one slot with 4GB RAM.
I did check the placement of the chips in the slots, i also checked one slot at a time, and one of them has gone broken.
Any ideas on how to make it run again? or if it is possible to replace the slots?
Brgds
Marek
MacBook Pro 2,7GHz Intel Core i7 / OSX 10.9.4

The Apple-accepted cure for a dead RAM slot is a new logic board. Unless you ahve AppleCare, that will be an expensive fix.
An Apple service option is the "depot repair." Instead of working on your computer in the Apple Store, they send it to a centralized refurbishment facility where they fix anything they find wrong (except for cosmetic damage and damage from abuse like dropping) for a flat fee of a little over US$300. That is between 30 and 40 percent of the parts and labor charges if Apple installs a new board in an Apple Store. Sometimes they will install an new battery at the depot without increasing the flat fee.
The downside is that it takes about a week; for that level of cost savings, I could do without my computer for a week.
So take it to Apple and ask about a depot repair.
A low-tech and low-cost option is to expand on what you are doing now--using one slot. Although the official RAM limit on your model is 8GB RAM (two 4GB models), your model can actually handle a total of 16GB (two 8GB modules. You can ignore the dead slot and put an 8GB module in the good slot. My 2012 MBP has 8GB RAM and is completely happy running Mavericks.
Be sure to ONLY get the RAM from an Mac-savvy vendor. For over a decade I've bought all our Mac RAM from one supplier. This is their page for an 8GB module for your MBP model:
http://eshop.macsales.com/item/OWC/1600DDR3S8GB/
I would also trust Crucial on this one. For a change they recognize that your model can use more RAM than stated in Apple's outdated specs:
http://www.crucial.com/usa/en/compatible-upgrade-for/Apple/macbook-pro-%2813-inc h-and-15-inch%2C-mid-2012%29

Yosemite made my MacBook Pro (Mid-2012) EXTREMELY slow

Yosemite has really gummed up my system. I'm reluctant to do a clean install, but I will if absolutely necessary.
This is what Etrecheck says. Any thought will be repaid by my eternal gratitude.
Problem description:
Macbook Pro (Mid-2012) is slow and lags following Yosemite installation.
EtreCheck version: 2.1.8 (121)
Report generated February 16, 2015 at 12:09:29 PM AST
Download EtreCheck from http://etresoft.com/etrecheck
Click the [Click for support] links for help with non-Apple products.
Click the [Click for details] links for more information about that line.
Hardware Information: ℹ️
    MacBook Pro (13-inch, Mid 2012) (Technical Specifications)
    MacBook Pro - model: MacBookPro9,2
    1 2.5 GHz Intel Core i5 CPU: 2-core
    4 GB RAM Upgradeable
        BANK 0/DIMM0
            2 GB DDR3 1600 MHz ok
        BANK 1/DIMM0
            2 GB DDR3 1600 MHz ok
    Bluetooth: Good - Handoff/Airdrop2 supported
    Wireless: en1: 802.11 a/b/g/n
    Battery Health: Normal - Cycle count 11
Video Information: ℹ️
    Intel HD Graphics 4000
        Color LCD 1280 x 800
        Thunderbolt Display 2560 x 1440
System Software: ℹ️
    OS X 10.10.2 (14C109) - Time since boot: one day 0:5:13
Disk Information: ℹ️
    APPLE HDD HTS545050A7E362 disk0 : (500.11 GB)
        EFI (disk0s1) <not mounted> : 210 MB
        Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
        Macintosh HD (disk2) / : 498.88 GB (390.89 GB free)
            Encrypted AES-XTS Unlocked
            Core Storage: disk0s2 499.25 GB Online
    HL-DT-ST DVDRW GS31N
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
    Apple Computer, Inc. IR Receiver
    Fitbit Inc. Fitbit Base Station
    Apple Inc. Apple Thunderbolt Display
    Apple Inc. Display Audio
    Apple Inc. FaceTime HD Camera (Display)
Thunderbolt Information: ℹ️
    Apple Inc. thunderbolt_bus
        Apple Inc. Thunderbolt Display
Gatekeeper: ℹ️
    Mac App Store and identified developers
Kernel Extensions: ℹ️
        /Library/Extensions
    [loaded]    com.sophos.kext.sav (9.2.50 - SDK 10.8) [Click for support]
    [loaded]    com.sophos.nke.swi (9.2.50 - SDK 10.8) [Click for support]
Problem System Launch Agents: ℹ️
    [killed]    com.apple.CallHistoryPluginHelper.plist
    [killed]    com.apple.cmfsyncagent.plist
    [killed]    com.apple.telephonyutilities.callservicesd.plist
    3 processes killed due to memory pressure
Problem System Launch Daemons: ℹ️
    [killed]    com.apple.ctkd.plist
    [killed]    com.apple.ifdreader.plist
    [killed]    com.apple.nehelper.plist
    [killed]    com.apple.wdhelper.plist
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Launch Agents: ℹ️
    [not loaded]    com.adobe.AAM.Updater-1.0.plist [Click for support]
    [running]    com.fujitsu.pfu.ScanSnap.AOUMonitor.plist [Click for support]
    [loaded]    com.oracle.java.Java-Updater.plist [Click for support]
    [running]    com.sophos.uiserver.plist [Click for support]
Launch Daemons: ℹ️
    [loaded]    com.adobe.fpsaud.plist [Click for support]
    [loaded]    com.ciscosystems.ciscoconnectupgrade.daemon.plist [Click for support]
    [running]    com.fitbit.galileod.plist [Click for support]
    [loaded]    com.microsoft.office.licensing.helper.plist [Click for support]
    [loaded]    com.oracle.java.Helper-Tool.plist [Click for support]
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    [running]    com.sophos.common.servicemanager.plist [Click for support]
User Launch Agents: ℹ️
    [loaded]    com.adobe.ARM.[...].plist [Click for support]
    [running]    com.akamai.single-user-client.plist [Click for support]
    [loaded]    com.google.keystone.agent.plist [Click for support]
User Login Items: ℹ️
    iTunesHelper    Application (/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)
    Dropbox    Application (/Applications/Dropbox.app)
    Family    Volume (/Volumes/Family)
    Eye-Fi Helper    Application (/Applications/Eye-Fi/Eye-Fi Helper.app)
    ScanSnap Manager    Application (/Applications/ScanSnap/ScanSnap Manager.app)
    Fitbit Connect Menubar Helper    Application (/Applications/Fitbit Connect.app/Contents/MacOS/Fitbit Connect Menubar Helper.app)
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    FlashPlayer-10.6: Version: 16.0.0.305 - SDK 10.6 [Click for support]
    Default Browser: Version: 600 - SDK 10.10
    AdobePDFViewerNPAPI: Version: 11.0.10 - SDK 10.6 [Click for support]
    AdobePDFViewer: Version: 11.0.10 - SDK 10.6 [Click for support]
    Flash Player: Version: 16.0.0.305 - SDK 10.6 [Click for support]
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    Dashlane: Version: Dashlane 1.0.0 - SDK 10.10 [Click for support]
Safari Extensions: ℹ️
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    Dashlane
    Evernote Web Clipper
3rd Party Preference Panes: ℹ️
    Akamai NetSession Preferences [Click for support]
    Flash Player [Click for support]
    Java [Click for support]
Time Machine: ℹ️
    Mobile backups: OFF
    Auto backup: YES
    Volumes being backed up:
        Macintosh HD: Disk size: 498.88 GB Disk used: 107.99 GB
    Destinations:
        Data [Network]
        Total size: 0 B
        Total number of backups: 0
        Oldest backup: -
        Last backup: -
        Size of backup disk: Too small
            Backup size 0 B < (Disk used 107.99 GB X 3)
Top Processes by CPU: ℹ️
         8%    WindowServer
         7%    Activity Monitor
         5%    sysmond
         1%    backupd
         1%    Fitbit Connect Menubar Helper
Top Processes by Memory: ℹ️
    69 MB    InterCheck
    56 MB    Safari
    43 MB    mds_stores
    39 MB    SophosScanD
    33 MB    mds
Virtual Memory Information: ℹ️
    76 MB    Free RAM
    961 MB    Active RAM
    866 MB    Inactive RAM
    1.12 GB    Wired RAM
    51.58 GB    Page-ins
    1.83 GB    Page-outs
Diagnostics Information: ℹ️
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    Feb 15, 2015, 12:00:37 PM    Self test - passed
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When you see a beachball cursor or the slowness is especially bad, note the exact time: hour, minute, second.
These instructions must be carried out as an administrator. If you have only one user account, you are the administrator.
Launch the Console application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad and start typing the name.
The title of the Console window should be All Messages. If it isn't, select
          SYSTEM LOG QUERIES ▹ All Messages
from the log list on the left. If you don't see that list, select
          View ▹ Show Log List
from the menu bar at the top of the screen.
Each message in the log begins with the date and time when it was entered. Scroll back to the time you noted above.
Select the messages entered from then until the end of the episode, or until they start to repeat, whichever comes first.
Copy the messages to the Clipboard by pressing the key combination command-C. Paste into a reply to this message by pressing command-V.
The log contains a vast amount of information, almost all of it useless for solving any particular problem. When posting a log extract, be selective. A few dozen lines are almost always more than enough.
Please don't indiscriminately dump thousands of lines from the log into this discussion.
Please don't post screenshots of log messages—post the text.
Some private information, such as your name, may appear in the log. Anonymize before posting.

My Brandnew 15 inch Macbook Pro (mid 2012) Crash to Black Screen

My Brandnew Macbook Pro (Mid-2012) just purchased last August 2012, i turned it on and watched some movie online and youtube when all of a sudden, the screen would turn black and the machine would not react to any keyboard or mouse input anymore. All I could do was hold down the power button to turn the computer off.
i really appreciate your ideas about this problem...

If it has happened more than once, make a "Genius" appointment at an Apple Store to have the machine tested.
Back up all data on the internal drive(s) before you hand over your computer to anyone. If privacy is a concern, erase the data partition(s) with the option to write zeros* (do this only if you have at least two complete, independent backups, and you know how to restore to bare metal from any of them.) Don’t erase the recovery partition, if present.
*An SSD doesn't need to be zeroed.

My iPad 3 is not charging on my macbook pro mid-2012. It was working yesterday and it is not working now, and I'm trying to transfer files between them. How do I charge my iPad with my macbook without having to be a completely new computer?

I am trying to transfer files between my ipad 3 and my macbook pro mid-2012 and they will just not connect. I connected them yesterday and it worked fine. And i can not air drop these files into my ipad it has to be done through itunes. And i can not afford to buy a new computer. How do i get these two to connect without having to buy a completely new computer?

Computer USB ports, regardless of the computer maker, have a relatively low power output and thus are not good chargers. They will charge but it takes a long time. You should be charging your iPad from wall power, or a more powerful source like an in-car charger.
Buying another computer will not change that.

My Macbook Pro (Mid-2012) won't connect to an external display using my MiniDP to VGA Cable.

I'm on a Macbook Pro (Mid-2012) on Mac OS X 10.8.3 (currently downloading the update to 8.4). When I plug in my Mini Displayport to VGA adapter to my Mac, the screen flickers blue for a second and the Display Settings window detects the other monitor and allows me to rearrange the screen, but it does not project anything onto the other monitor. However, I tried connecting an Apple Thunderbolt Monitor to this computer today, and it worked. This wasn't a problem before, as I was able to connect this Mac to other LCD projects before. Furthermore, I don't think it's an issue with the adapter either because it's relatively new. I also tried plugging in the adapter of another Mac (which was working fine) into my Mac, but it didn't work either.
Here's what I've tried:
1. Restarting the computer with everything plugged in
2. Pressing Command + F1 when it's plugged
Any advice would be helpful!

Hi lancekatigbak,
If you're having issues with the display out on your MacBook Pro, you may want to take a look at the troubleshooting steps in the following article:
Apple computers: Troubleshooting issues with video on internal or external displays
http://support.apple.com/kb/ht1573
Cheers,
- Brenden

MacBook Pro(Mid 2012) Can't connect to my Dynex TV with mini display port to VGA adapter

I have a MacBook Pro(Mid 2012, running OS X 10.9.4) and I recently just bought a mini display port to VGA adapter so I could hook it up to my dynex TV but when I connect everything my TV says no signal. Do I need to do something in settings?

Hi psikalis,
If you are having issues connecting an external display to your MacBook Pro, you may find the information and troubleshooting steps in the following articles helpful:
OS X Mavericks: Connect multiple displays to your Mac
http://support.apple.com/kb/PH13814
Apple computers: Troubleshooting issues with video on internal or external displays
http://support.apple.com/kb/HT1573
Regards,
- Brenden

How can connect my macbook pro mid 2012 to my imac 21.5 inch mid 2010 ?? I want to use imac like a display for macbook.

How can connect my macbook pro mid 2012 to my imac 21.5 inch mid 2010 ?? I want to use imac like a display for macbook.

Target Display Mode: Frequently Asked Questions (FAQ)
with a mini display to mini display cable. Attach it to the Thunderbolt port on your MBP and to the mini display port on your iMac.
How do I enable TDM?
Make sure both computers are turned on and awake.
Connect a male-to-male Mini DisplayPort or ThunderBolt cable to each computer.
Press Command-F2 on the keyboard of the iMac being used as a display to enable TDM.
Note: In Keyboard System Preferences, if the checkbox is enabled for "Use all F1, F2, etc. keys as standard functions keys," the key combination changes to Command-Fn-F2.

Can I use my macbook pro mid 2012 as an external display using thunderbolt port

Hi,
I want to use my macbook pro (mid 2012) screen as an external display for a raspberry pi using a HDMI to Thunderbolt cable, via the thunderbolt port on the macbook pro. Would this be possible? Can the macbook pro's thunder bolt port act as an input and is any additional software required?
I look forward to hearing from you.
Thanks in advance!

Welcome to Apple Support Communities
You are referring to Target Display mode. Target Display mode can only be used in 27-inch iMacs and iMacs with Thunderbolt, not MacBooks Pro > http://support.apple.com/kb/PH11302
Unfortunately, you can't use the MacBook Pro as a display. It doesn't support the monitor mode

Macbook pro mid-2012 13" has very slow disk access

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It should not take 5 hours to install Mac OS X. There is something wrong with the disk. Try reformatting where you do a wipe of the drive (an select the option to write zeros which will remap bad sectors). Then try to install MAc OS X.
I got this information from here:
http://reviews.cnet.com/8301-13727_7-20064489-263.html
Back up your data.
Use Time Machine or a system cloning utility to create a full and restorable backup of your data. If you suspect bad blocks, then when cloning you might consider not using a "block-level" copy process, since this will likely run into problems.
Boot to the utilities DVD.
If you have a boot DVD for a tool like Drive Genius or another drive utility, then boot to that; if not, use your OS X installation DVD (once you select your language, open Disk Utility from the Utilities menu).
Format the drive.
Using your selected utility, format the drive and check for bad blocks. If you are using Disk Utility, click the Erase tab, click the Options button, and then select the option to write zeros to the disk (you do not need to do multipass erase options, as this will provide no additional benefit for managing bad blocks). Writing to zeros may take a couple of hours depending on the size of the drive, but when done the drive will have remapped any blocks that were not reliably read.
Restore the OS installation.
If you have used Time Machine to create your backup, boot to your OS X installation DVD (if you are not using Disk Utility) and use the option in the Utilities menu to restore from backup. Attach your Time Machine drive and then proceed with the restoration, selecting the newest backup as the one to restore to your system. If you have used a system cloning tool, then attach the cloned drive and boot off of it (hold the Option key at start-up to select it from the boot menu). When you are booted to the cloned drive, run your cloning utility to copy the installation back to the computer's main boot drive.An optional approach here is to perform a full reinstallation of the OS from your installation DVD, and then migrate your data, applications, and settings from either the clone or the Time Machine backups using Apple's Migration Assistant.

Macbook Pro (Mid 2012) Startup Time Increased

Hi everyone,
I have a Macbook Pro (Mid 2012) non-retina model. I have an upgraded SSD (Crucial MX100). The startup time from switching on to the login screen is usually around five seconds but since this morning the time has increased to around 40 seconds. When the power button is pressed, the tone sounds and the screen lights up but it takes quite a while for the apple logo to appear. I haven't added or removed anything or changed any settings since before this happened. There doesn't seem to be any changes to the performance of the computer once it has started up, or the time taken from the password entered for the bar to load (Yosemite).
My hard drive cable once broke and I had it replaced at an Apple store (if that means anything to anyone). If anyone could give me any possible explanations or advise on how I can return the boot up time to the normal time.
Thanks,
Ben

    Select Macintosh HD as the Startup Disk.
“Set the default startup disk”       http://support.apple.com/kb/HT1310
   Reset PRAM.      http://support.apple.com/kb/PH18761?viewlocale=en_US&locale=en_US
   Start up in Safe Mode.   http://support.apple.com/kb/PH18760

Macbook pro mid-2012 GPU-panic

Hi, my Macbook Pro mid-2012 has recently started rebooting sporadically. After some investigation I found out that it is caused by GPU Panic which happens EVERY TIME when discrete GPU (NVidia 650M) is enabled and its temperature goes over 64-65 degrees (Celsius, according to iStat).
It seems it started to happen after one of the OS updates.
Did you faced this issue? Is it software or hardware related? Are there any workarounds/fixes?
Now I am using gfxCardStatus to use Integrated GPU only, but it makes not possible using any 3D-games on this laptop.
Thanks,
Nikolay

Are you running any anti-virus or internet security software? Any cleaning, tune-up, "keeper," or optimization apps that did not come preinstalled?
Are you set up to do torrent downloading?
Are you using backup software other than Time Machine, like that which comes bundled with a external hard drive?
Are you using an online backup serviceother than iCloud (Carbonite; MS OneDrive; Google Drive)?
Those can run up the internal temps.

Migration Assistant can't find External HD on MacBook Pro Mid-2012

Hi, I have a MacBook Pro Mid-2012 running OS X Mountain Lion 10.8.2 and I am trying to use Migration Assistant to transfer Time Machine backups that are on my external hard drive, that I backed up from my old MacBook Mid-2010. The problem I am having is that Migration Assistant can't find my external hard drive. My MacBook Pro can find it when I plug it in (I see it in Finder), but Migration Assistant can't. Can anyone help or should I go to the Apple Store? I need help with this problem as soon as possible.
Thanks in advance,
- Daniel 

Since no one replied I figured out how to do it myself.
1.) First I plugged in my external hard drive with my Time Machine backups on them, then I opened Finder and click on my external hard drive under devices.
2.) Next I clicked on and opened the folder named "Backups.backupdb"
3.) Once inside that folder I could see folders with the backups from Time Machine and all of the folders names were the date I backed up that backup. I clicked and opended the lastest backup folder.
4.) Inside that folder, I clicked and opened the folder named "Macintosh HD"
5.) Inside that folder, I clicked and opended the folder named "Users"
6.) Inside that folder, I clicked and opended the folder named "Daniel" which was my Username on my previous Mac.
7.) Finally I could see and access all my folders from my Time Machine backups from my previous Mac.
Keep in mind this is only helpful if you are trying to access old backups (backed up from another Mac) on a new or different Mac. (Sorry for the blurry images)
Hope this somehow helps someone else,
- Daniel 

Macbook pro mid 2012 no retina performance drop after efi

Hi, mi macbook pro mid 2012 no retina after efi update the performance are too slow, thats is the same problem with retina, please fix it, in osx mountain lyon the aplications that used every daywith video is poor, in bootcamp with games is the same problem, the cpu clock drops from3.3 ghz to 1.2 ghz or more. Waiting for a mew efi update bescause my mac is the same that a macbook air

No Apple hasn't officially stated anything about this issue. After I updated to EFI Update 2.0 I noticed the issues and started doing my research and found people in the Macrumors forums having the same problems and eventually I was reading that users that didn't update yet weren't seeing the update in their updates meaning Apple pulled the update from the servers. Other users reported after calling Applecare that they were aware of the issue.

Sudden lag/stutter in macbook Pro mid 2012

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