Why is my mac running slow after MOuntain Lion update??

after i updated my Mac Book it starts to browse very slow..why????

It doesn't sound like it, but you might try adding a different DNS server.
In Network System prefs, select the network service you use (ethernet or WiFi).
Click on Advanced.
Click on DNS tab.
Click the + button
Enter these numbers:
For OpenDNS: 208.67.222.222 and 208.67.220.220
Or Google: 8.8.8.8 and 8.8.4.4

Similar Messages

Mac running slow after mountain lion

Mac startted running slower about a week after downloading Mountain Lion. Is that possible related?

Probably not but you haven't said anything about your system configuration so that may have a bearing on things. How much RAM is installed on your machine? If you have the 2GB minimum then you almost certainly could benefit by a RAM upgrade. Please complete your profile so we know a bit more about your system, it won't help on this thread because the thread has already begun however it will be useful down the road. For instructions on how please click Profile Update.
Another thing you can do is open Disk Utility (Applications - Utilities - Disk Utility) and run Repair Disk Permissions, I'd recommend doing that at least 2X.

Macbook running slow after mountain lion update

why? i have 2 gb of RAM, that should be more than enough, right?
firefox is running slow, everything is freezing. i have barely used any of my hard drive space with it being at 225.61 gb free out of 249.2 gb.
its really frustrating.....

Two gb is the bare minimum for running Mountain Lion.
The model 7,1 (Mid 2010, White Unibody) can use 8gb of 204 pin 1066mhz PC3-8500 RAM
These are good online stores for Mac compatible RAM
OWC http://eshop.macsales.com/shop/memory/Apple_MacBook_MacBook_Pro/Upgrade/DDR3_Whi te - They offer Mac tested RAM at very good prices.
Crucial Memory http://www.crucial.com/ - good place to buy RAM from all over the world. They also have an excellent memory selector that allows you to choose memory based on your computer's model
Data Memory Systems http://www.datamemorysystems.com/apple-memory.asp - another good, cheap place to buying RAM if you live in the U.S.
Here are video instructions on replacing the RAM on the White Unibody.
http://eshop.macsales.com/installvideos/macbook_13_09_unibody_mem/
If you don’t have the tools to open up the MacBook OWC has a set for $5.
http://eshop.macsales.com/item/OWC/TOOLKITMHD/

IMac-27inch model (late 2012) running slow after Mountain Lion 10.8.5 supplemental update

I have the iMac 27-inch (late 2012 model), 8GB RAM, 1TB Hard Drive. All of a sudden after the Mountain Lion 10.8.5 Supplemental update it started running like molasses (apps take forever to open, takes forever to wake out of sleep, long boot up times, etc.) I ran verify disk, verify disk permissions, etc. I found that when I ran verify disk permissions, it stated that the iTunes permissions weren't right so I repaired disk permissions, reboot, still same problem. Ran verify disk permissions again, once again iTunes permissions issues, repair disk permissions, restart, same problem over and over again like Ground Hog Day, please help...

First, back up all data immediately, as your boot drive might be failing.
Step 1
This diagnostic procedure will query the log for messages that may indicate a system issue. It changes nothing, and therefore will not, in itself, solve your problem.
If you have more than one user account, these instructions must be carried out as an administrator. I've tested them only with the Safari web browser. If you use another browser, they may not work as described.
Triple-click anywhere in the line below on this page to select it:
syslog -k Sender kernel -k Message CReq 'Channel t|GPU D|I/O|find tok|n Cause: -' | tail | open -ef
Copy the selected text to the Clipboard (command-C).
Launch the Terminal 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. Click Utilities, then Terminal in the icon grid.
Paste into the Terminal window (command-V).
The command may take a noticeable amount of time to run. Wait for a new line ending in a dollar sign (“$”) to appear.
A TextEdit window will open with the output of the command. Normally the command will produce no output, and the window will be empty. If the TextEdit window (not the Terminal window) has anything in it, stop here and post it — the text, please, not a screenshot. The title of the TextEdit window doesn't matter, and you don't need to post that.
Step 2
There are a few other possible causes of generalized slow performance that you can rule out easily.
Reset the System Management Controller.
If you have a portable computer, check the cycle count of the battery. It may be due for replacement.
If you have many image or video files on the Desktop with preview icons, move them to another folder.
If applicable, uncheck all boxes in the iCloud preference pane. See whether there's any change.
Disconnect all non-essential wired peripherals and remove aftermarket expansion cards, if any.
Check your keychains in Keychain Access for excessively duplicated items.
Boot into Recovery mode, launch Disk Utility, and run Repair Disk.
If you're booting from an aftermarket SSD, see whether there's a firmware update for it.
If you have a MacBook Pro with dual graphics, disable automatic graphics switching in the Energy Saverpreference pane for better performance at the cost of shorter battery life.
Step 3
When you notice the problem, launch the Activity Monitor 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. Click Utilities, then Activity Monitor in the icon grid.
Select the CPU tab of the Activity Monitor window.
Select All Processes from the menu in the toolbar, if not already selected.
Click the heading of the % CPU column in the process table to sort the entries by CPU usage. You may have to click it twice to get the highest value at the top. What is it, and what is the process? Also post the values for % User, % System, and % Idle at the bottom of the window.
Select the System Memory tab. What values are shown in the bottom part of the window for Page outs and Swap used?
Next, select the Disk Activity tab. Post the approximate values shown for Reads in/sec and Writes out/sec (not Reads in and Writes out.)
Step 4
If you have more than one user account, you must be logged in as an administrator to carry out this step.
Launch the Console application in the same way you launched Activity Monitor. Make sure the title of the Console window is All Messages. If it isn't, select All Messages from the SYSTEM LOG QUERIES menu on the left. If you don't see that menu, select
View ▹ Show Log List
from the menu bar.
Select the 50 or so most recent entries in the log. Copy them to the Clipboard (command-C). Paste into a reply to this message (command-V). You're looking for entries at the end of the log, not at the beginning.
When posting a log extract, be selective. Don't post more than is requested.
Please do not indiscriminately dump thousands of lines from the log into this discussion.
Important: Some personal information, such as your name, may appear in the log. Anonymize before posting. That should be easy to do if your extract is not too long.

MacBook Pro runs slow after Mountain Lion installation

I have a mid-2009 13" MacBook Pro with 2.2g Ghz processor, 2 GB of RAM and 160 GB encrypted disc.
After installing Mountain Lion and the recent upgrade OS X 10.8.1 (12B19), the system runs noticibly slower than with Lion, which ran slower than the previous version. This shows up in opening and closing programs, rate that drop down windows appear when something is clicked on the task bar, rate that windows open and close, rate that the dock comes up and the icons expand when the curser is moved over them, etc.
Due to my type of work, I need to encrypt the disc. I know this is costing me some speed. I unencrypted the disc and it ran noticably faster, and when I re-encrypted it seemed to run faster than before unencrptying and re-encripting. I have repaired permissions and verified the disk OK.
Somewhere in the build up to Mountain Lion release I thought I read where 4 GB of ram was recomended for Mountain Lion, allthough now the specs indicate 2 GB is OK. In activity monitor, the pie chart for system memory seems to always remain less than about 40% of active memory (yellow).
What recomendations does the community have to increase the speed of operations back to when this system was new?
Dave

I was having the exact same problem. My MacBook Pro was seriously close to unusable how slow it was. On a different thread, someone recommended I reset the VRAM and PVRAM (not sure about those initials). Shut down computer. Rebooted while holding down Command-Option-P-R all at the same time until I heard the second startup tone and then released. I noticed an improvement in performance immediately.

Why does office 2011 run slow under mountain lion?

I was in an Apple Store and launched MS Office (Word or Powerpoint) on a new iMac they had on display. It was very slow. I rebooted and repeated the event from cold. It made no difference. Is there a problem with M.Lion and Office 2011?

I suspect it isn't that the program is running slow it's just these programs aren't made by apple therefore could take up alot of RAM space so the more apps you have open the slower your system will be. Try downloading apple's iWork (pages, keynote and numbers) and quitting some apps. You should see a major difference. If you would like to stick with MS Office just quit your apps. I doubt it's the program.

Why does Time Machine forget "everything" after Mountain Lion update?

After updating to Mountain Lion (from Snow Leopard), I fired up my trusty external hard drive which contains my Time Machine backups (and nothing else) - of course I had run a backup right before upgrading to be sure. Two things are deeply disturbing: 1) The drive keeps on "rattling" as if a process is constantly reading or writing to it - even with Time Machine "OFF". Why? I (tried to) explicitly disable(d) Spotlight searching that drive, and nothing else should be accessing it! (I wish there was a way to simply turn Spotlight OFF for a while - I suspect it of a lot of crashes I experience).
Anyway, even more disturbing: Opening the System Preference Panel and sliding Time Machine to "On", it claims there is NO backup at all! Oldest backup: "NONE". Latest backup: "NONE". This is B.S.! BTW, opening the "Time Machine" app proper shows all the recent backups, so they are still there. So why doesn't the Time Machine Preference Panel not recognize them? Under these circumstances, is it safe to enable backups??? I am very afraid that if I let Time Machine proceed, it will try to create a full new backup, perhaps overriding all the snapshots from the past that are still stored on that disk. For one, even at 1 TB, my disk is not big enough to take another full backup on top of what's already stored on there. Any advice (other than "buy another hard disk just to be safe")?
O.k., I admit, so far I'm more upset with Mountain Lion than impressed.

Dear Pondini,
I am grateful for your advice and encouraging words, but I am (and remain) at my wit's ends as far as Time Machine is concerned. While I'm sure 99.99% of Mac users have no problem, there must be SOMETHING idiosyncratic about my own setup that has consistently crashed TM in the past, and now (after upgrading to Mountain Lion), it simply refuses to work EVER. Mind you, I'm NOT a "hacker" who installs non-standard software or likes to poke around in the Kernel.
Below is a shortened version of the Console output during my latest attempt - after 3 tries (after running disk utility to repair my permissions and check the hard drive), it never makes it beyond about 4 Gb before crashing. (And, what's worse, if I don't immediately react, TM very often crashes the whole computer to the point where NOTHING works anymore - requiring a restart. Even with Mountain Lion).
Thanks for any offer of help from anyone... SK
THIS WAS RIGHT BEFORE I TRIED TO START THE BACKUP
7/30/12 12:42:46.697 PM WindowServer[73]: [cps/setfront] Failed setting the front application to Finder, psn 0x0-0xc00c, securitySessionID=0x186a4, err=-13066 _
7/30/12 12:46:53.815 PM UserEventAgent[180]: com.apple.TMLaunchAgent disabled
NONE OF THE ABOVE WAS IN RESPONSE TO ANYTHING I DID! BUT MAYBE A CLUE?
ANYWAY, HERE GOES (with many repetitive lines removed - indicated by gaps):
7/30/12 12:48:52.885 PM com.apple.backupd[320]: Starting manual backup
7/30/12 12:48:53.475 PM com.apple.backupd[320]: Backing up to: /Volumes/TimeShare/Backups.backupdb
7/30/12 12:48:55.101 PM com.apple.backupd[320]: Event store UUIDs don't match for volume: Macintosh HD
7/30/12 12:48:55.799 PM com.apple.backupd[320]: Deep event scan at path:/ reason:must scan subdirs|new event db|
7/30/12 12:49:20.607 PM com.apple.launchd.peruser.501[156]: (com.apple.KerberosHelper.LKDCHelper[212]) Exited with code: 1
7/30/12 12:54:19.579 PM com.apple.backupd[320]: Finished scan
7/30/12 12:59:57.836 PM com.apple.backupd[320]: Found 470214 files (18.15 GB) needing backup
7/30/12 12:59:58.422 PM com.apple.backupd[320]: 24.03 GB required (including padding), 312.52 GB available
7/30/12 1:05:28.000 PM kernel[0]: disk1s2: I/O error.
7/30/12 1:05:28.000 PM kernel[0]: disk1s2: I/O error.
7/30/12 1:05:28.000 PM kernel[0]: jnl: disk1s2: do_jnl_io: strategy err 0x5
7/30/12 1:05:28.000 PM kernel[0]: jnl: disk1s2: write_journal_header: error writing the journal header!
7/30/12 1:05:28.000 PM kernel[0]: disk1s2: I/O error.
7/30/12 1:05:28.693 PM com.apple.backupd[320]: Error (256): fetching properties: Error Domain=NSCocoaErrorDomain Code=256 "The file “Credits.rtf” couldn’t be opened." UserInfo=0x7f8b749355c0 {NSURL=file://localhost/Volumes/TimeShare/Backups.backupdb/kuhn%E2%80%99s%20Mac Book%20Pro/2012-07-26-114729/Macintosh%20HD/Applications/Preview.app/Contents/Re sources/zh_TW.lproj/Credits.rtf, NSFilePath=/Volumes/TimeShare/Backups.backupdb/kuhn’s MacBook Pro/2012-07-26-114729/Macintosh HD/Applications/Preview.app/Contents/Resources/zh_TW.lproj/Credits.rtf, NSUnderlyingError=0x7f8b7493fff0 "The operation couldn’t be completed. Input/output error"}
7/30/12 1:05:28.694 PM com.apple.backupd[320]: Error: (-50) SrcErr:NO Copying /Applications/Preview.app/Contents/Resources/zh_TW.lproj/Credits.rtf to /Volumes/TimeShare/Backups.backupdb/kuhn’s MacBook Pro/2012-07-30-124855.inProgress/A9556B25-47FE-4D1F-A2C9-BF18EEF78898/Macintosh HD/Applications/Preview.app/Contents/Resources/zh_TW.lproj
7/30/12 1:05:28.000 PM kernel[0]: disk1s2: I/O error.
7/30/12 1:05:30.000 PM kernel[0]: disk1s2: I/O error.
7/30/12 1:05:30.341 PM com.apple.backupd[320]: Error writing to backup log. NSFileHandleOperationException:*** -[NSConcreteFileHandle writeData:]: Invalid argument
7/30/12 1:05:30.341 PM com.apple.backupd[320]: Error: (-50) SrcErr:NO Copying /Applications/Preview.app/Contents/version.plist to /Volumes/TimeShare/Backups.backupdb/kuhn’s MacBook Pro/2012-07-30-124855.inProgress/A9556B25-47FE-4D1F-A2C9-BF18EEF78898/Macintosh HD/Applications/Preview.app/Contents
7/30/12 1:05:30.341 PM com.apple.backupd[320]: Error writing to backup log. NSFileHandleOperationException:*** -[NSConcreteFileHandle writeData:]: Invalid argument
7/30/12 1:05:30.341 PM com.apple.backupd[320]: Error: (-50) SrcErr:NO Copying /Applications/Preview.app/Contents/XPCServices to /Volumes/TimeShare/Backups.backupdb/kuhn’s MacBook Pro/2012-07-30-124855.inProgress/A9556B25-47FE-4D1F-A2C9-BF18EEF78898/Macintosh HD/Applications/Preview.app/Contents
7/30/12 1:05:30.381 PM com.apple.backupd[320]: Stopping backup.
7/30/12 1:05:30.381 PM com.apple.backupd[320]: Error writing to backup log. NSFileHandleOperationException:*** -[NSConcreteFileHandle writeData:]: Invalid argument
7/30/12 1:05:30.381 PM com.apple.backupd[320]: Error: (-8062) SrcErr:NO Copying /Applications/Preview.app/Contents/XPCServices/com.apple.Preview.TrustedBookmar ksService.xpc/Contents/_CodeSignature/CodeResources to (null)
7/30/12 1:05:30.385 PM com.apple.backupd[320]: Error writing to backup log. NSFileHandleOperationException:*** -[NSConcreteFileHandle writeData:]: Invalid argument
7/30/12 1:05:30.386 PM com.apple.backupd[320]: Error writing to backup log. NSFileHandleOperationException:*** -[NSConcreteFileHandle writeData:]: Invalid argument
7/30/12 1:05:30.386 PM com.apple.backupd[320]: Copied 96604 files (2.26 GB) from volume Macintosh HD.
7/30/12 1:05:30.386 PM com.apple.backupd[320]: Error writing to backup log. NSFileHandleOperationException:*** -[NSConcreteFileHandle writeData:]: Invalid argument
7/30/12 1:05:30.387 PM com.apple.backupd[320]: Copy stage failed with error:11
7/30/12 1:05:30.389 PM com.apple.backupd[320]: Error writing to backup log. NSFileHandleOperationException:*** -[NSConcreteFileHandle writeData:]: Invalid argument
7/30/12 1:05:30.000 PM kernel[0]: disk1s2: I/O error.
7/30/12 1:05:30.464 PM com.apple.backupd[320]: Error: (5) getxattr for key:com.apple.backupd.SnapshotState path:/Volumes/TimeShare/Backups.backupdb/kuhn‚Äôs MacBook Pro/2011-06-14-140802
7/30/12 1:05:30.000 PM kernel[0]: disk1s2: I/O error.
7/30/12 1:05:31.178 PM com.apple.backupd[320]: Error: (5) getxattr for key:com.apple.backupd.SnapshotState path:/Volumes/TimeShare/Backups.backupdb/kuhn‚Äôs MacBook Pro/2012-07-26-114729
7/30/12 1:05:31.000 PM kernel[0]: disk1s2: I/O error.
7/30/12 1:05:31.248 PM com.apple.backupd[320]: Error: (22) setxattr for key:com.apple.backupd.HostUUID path:/Volumes/TimeShare/Backups.backupdb/kuhn‚Äôs MacBook Pro size:37
7/30/12 1:05:41.526 PM com.apple.backupd[320]: Backup failed with error: 11
7/30/12 1:09:42.396 PM mtmfs[37]: filesystem unmount attempted from stopFS
7/30/12 1:09:42.557 PM mtmfs[37]: unmount failed for /Volumes/MobileBackups
NOTE THE FAILURE TO UNMOUNT
7/30/12 1:10:02.499 PM fseventsd[48]: disk logger: failed to open output file /Volumes/TimeShare/.fseventsd/636573369d318daf (Invalid argument). mount point /Volumes/TimeShare/.fseventsd
7/30/12 1:10:04.000 PM kernel[0]: disk1s2: I/O error.
HERE I USED "FORCE EJECT"
7/30/12 1:10:04.799 PM fseventsd[48]: disk logger: failed to open output file /Volumes/TimeShare/.fseventsd/636573369d318daf (Invalid argument). mount point /Volumes/TimeShare/.fseventsd
7/30/12 1:10:05.000 PM kernel[0]: jnl: disk1s2: close: journal 0xffffff8042d1bcc0, is invalid. aborting outstanding transactions

Whys is my mac so slow with mountain lion

Hi
I have an early 2008 Macbook Pro with 4GB RAM. I recently installed ML and CS6 and I have had nothing but problems since. I have reverted back to CS5 Photoshop and illustrator which has improved things slightly but generally, my machine has become a nightmare. It's SO slow - and it's not just the system - my internet is also unbearable. I am a freelancer and connect to other networks onsite and I have exactly the same problems there too. When I have PS and ID running, Activity monitor tells me I am using 3.67GB RAM - and I only have 2 smalll files open. It has become virtually unworkable and it's just not good for the soul - I really need help!
Any suggestions or tips would be very gratefully received.
Thanks!

First, back up all data immediately, as your boot drive might be failing.
Take these steps when you notice the problem.
Step 1
Launch the Activity Monitor 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. Click Utilities, then Activity Monitor in the icon grid.
Select the CPU tab of the Activity Monitor window.
Select All Processes from the menu in the toolbar, if not already selected.
Click the heading of the % CPU column in the process table to sort the entries by CPU usage. You may have to click it twice to get the highest value at the top. What is it, and what is the process? Also post the values for % User, % System, and % Idle at the bottom of the window.
Select the System Memory tab. What values are shown in the bottom part of the window for Page outs and Swap used?
Next, select the Disk Activity tab. Post the approximate values shown for Reads in/sec and Writes out/sec (not Reads in and Writes out.)
Step 2
You must be logged in as an administrator to carry out this step.
Launch the Console application in the same way as above. Make sure the title of the Console window is All Messages. If it isn't, select All Messages from the SYSTEM LOG QUERIES menu on the left.
Post the 50 or so most recent messages in the log — the text, please, not a screenshot.
When posting a log extract, be selective. Don't post more than is requested.
Please do not indiscriminately dump thousands of lines from the log into a message.
Important: Some personal information, such as your name, may appear in the log. Edit it out before posting.

Why is my mac so slow after iCloud/lion?

my macbook pro doesn't respond with the agility that it did before i switched to icloud/lion.
it's very annoying.
i have to restart it often. when i plug in my iphone it takes a while to synch if it does at all.
what to do?
thanks for your help!

SAME SAME SAME
Really TERRIBLE !!
This is unbelievable for Apple.
Since moving to iCloud My computer freezes, is extremely slow (sometimes have to wait 30 seconds just for a simple page to load in a program (not internet). My HDD KEEPS running and working for hours in a row
My contacts keep updating some adresses are in there 50 times or more now
I HATE THIS!
Have a quadcore iMac 27" on Lion, but also have 2 iphones (1 Iphone 3 that I cannot move to the cloud !!, My girlfriens is working on a white imac 20:" which cannot run iCloud, because her system won't allow iCloud and I cannot uypfgrade anymore.
Her emails get all mixed up.
This is a True MESS
Opening Programs takes forever.
THIS IS WORSE THAN PC !!
I wanted to go back to Me.Com but you can't
WHAT IS THIS !!!
WHAT A DISAPPOINTMENT !!
HELP HELP HELP

Why is my mac so slow after i downloaded os x yosemite? the rainbow circle shows up many times

why is my mac so slow after i downloaded os x yosemite? the rainbow circle shows up many times,what can i do? please help

why is my mac so slow after i downloaded os x yosemite? the rainbow circle shows up many times,what can i do? please help

Did macbook air mid 2009 running slow with mountain lion?

did macbook air mid 2009 running slow with mountain lion?

Yours is the first computer I've heard about on these forums that is attempting to run Mavericks with only 2GB of RAM.
Indeed that is acceptable per the Mavericks requirements:
http://support.apple.com/kb/HT5842
... but as you may know, Apple has not sold computers with as little as 2GB RAM for quite a while.
I suggest therefore you make sure you remove any applications that may be overtaxing your machine. Examples are browsers other than Safari, Mac cleaning products (such as Mac Keeper), or any other non-Apple app that has some startup process running (such as Outlook).

Applications run slower after 3.0 update...

my applications especially games are running slower after 3.0 update...
any ideas?

Try reseting your phone - press both the home and sleep/wake buttons until the Apple icon appears (ignore the red slider). If it's still slow, restore in iTunes. Apps should run at least as fast under 3.0 as 2.2.1)

After Mountain Lion update, i can't access Facebook and Hotmail websites

When I was with the OSX Lion, everything was fine.
After Mountain Lion update, i can't open Facebook and Hotmail websites.
I already reinstalled the Mountain Lion, but the error still happens. The only way to open these websites is with the private navigation.
Please, help me.

From your Safari menu bar (top of your screen) click Safari > Preferernces then select the Privacy tab.
Click: Remove All Website Data
Quit then relaunch Safari to test.
If you still have problems with Facebook, go to the Facebook page then click the downward facing arrow to the right of Home then click Account Settings.
Select Security on the left then click Secure Browsing.
Select the box next to: Browse Facebook on a secure connection (https) when possiblle then click Save Changes.

SD Card not showing after Mountain Lion Update

This matter has been discussed for some time now in
Apple Support Communities > Desktop Computers > iMac (Intel) > Discussions
SD Card not showing after Mountain lion Update
Since the update to Mountain Lion, the SD slot does not show up in Finder.
Someone gave a fix using the killall in Terminal, and that worked only once. I have not been able to get that fix to work again.
The only saving grace for me is that my SD Card us is always from my Nikon camera, and Nikon ViewNX 2 software is able to see and read from the card.
Killall may have worked partially in that I no longer get the error message telling me that I have removed the SD card improperly, and need to dismount it first.
However, Finder still cannot see it.

BrianForbesColgate wrote:
Thanks, Barney ...
Those are basics ... Been there, done that, first.
Then you should hava posted all the troubleshooting you already accomplished.
Does the card show up in System Information? Or is that another one of the "basics" you've already looked into?
Does it show up in Disk Utility? If so, have you tried formatting it there to determine if it is a formatting problem?

Why is my safari running slow after updating my mac?

My safari is running slow after completing a software update. I have cleared the cache. It did not help.

Please answer as many of the following questions as you can. You may already have answered some of them. In that case, there's no need to repeat the answers.
Have you restarted your router and your broadband device (if they're separate) since you first noticed the problem? If not, do that now and see whether there's any change.
If your browser is Safari, then from the Safari menu bar, select
Safari ▹ Preferences... ▹ Privacy ▹ Remove All Website Data
and confirm. Any change?
If you're running OS X 10.9 or later, select the Advanced tab in the Preferences window and uncheck the box marked
Stop plug-ins to save power
Any change?
Quit and relaunch the browser. Any change?
Log out and log back in. Any change?
Enable Private Browsing in the Safari menu. Any change?
Are any other web browsers installed, and are they the same? What about other Internet applications, such as iTunes and the App Store?
If other browsers and Internet applications are also affected, follow these instructions and test. Any change?
If Parental Controls is active for any user, please turn it off and test. Any change?
If only Safari is affected, launch the Activity Monitor application and enter "web" (without the quotes) in the search box. If a process named "Safari Web Content" is shown in red or is using more than about 5% of a CPU, select it and force it to quit by clicking the X or Quit Process button in the toolbar of the window. There may be more than one such process. Any improvement?
Again, if only Safari is involved, open the iCloud preference pane and uncheck the box marked Safari, if it's checked. Any change?
Are there any other devices on the same network that can browse the Web, and are they affected?
If you can test Safari on another network, is it the same there?
If you connect to your router with Wi-Fi and you can also connect with Ethernet, do that and turn off Wi-Fi. Any difference?

Why is my mac running slow after MOuntain Lion update??

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