Why is Mail so slow on Mountain Lion?

Hi there, I have about 200,000 e-mails in my mailbox. Double-clicking regularly takes 5-10 seconds to open with the "Loading..." message. Also, file attachments don't seem to be there when I open an e-mail downloaded 15 minutes or more prior. It feels a lot slower that Lion. I was hoping it would be faster. I hope they work on optimizing Mail, because it doesn't feel better than Lion.
Thanks...Neil

Quit Mail.
Back up all data if you haven’t already done so. Before proceeding, you must be sure you can restore your system to the state it’s in now.
In the Finder, select Go ▹ Go to Folder... from the menu bar, copy the text on the line below into the box that opens, and press return:
~/Library/Mail/V2/MailData/Envelope Index
Delete the selected file. Relaunch Mail and test. It should re-index your mailboxes.

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Hello,
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This didn't solve my problem. First of all:
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     ls: /Library/Preferences/com.apple.mail.plist: No such file or directory
but I do have the file in my local Library:
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     /Users/spate/Library/Containers/com.apple.mail/Data/Library/Preferences
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     lrwxr-xr-x 1 spate spate     64 Jul 26 11:08 com.apple.mail.LSSharedFileList.plist@ ->      ../../../../../Preferences/com.apple.mail.LSSharedFileList.plist
     -rw------- 1 spate spate   6733 Jul 27 08:24 com.apple.mail.plist
     -rw------- 1 spate spate 56130 Jul 27 08:12 com.apple.mail.plist.bak
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This is horribly painful!

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Welcome to Apple Communities
http://www.reedcorner.net/understanding-upgrade-nightmares/ Open Activity Monitor and check the RAM and CPU usage

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Second MUYB wrote:
It would be better if you explained what your program actually does - does it just do a dump of all user processes, does it check settings - what does it do that the built-in diagnostics or a list of command line instructions do not provide (that has as advantage that it's much more transparent what goes on)?
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After all, you are asking people to run an untrusted and probably unsigned program, so I'm actually happy they display a reluctance to do this.
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And extraordinarily rare
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Hardware Information:
          MacBook Pro - model: MacBookPro8,1
          1 2.4 GHz Intel Core i5 CPU: 2 cores
          8 GB RAM
Startup Items:
          HWNetMgr - Path: /Library/StartupItems/HWNetMgr
          HWPortDetect - Path: /Library/StartupItems/HWPortDetect
          StartOuc - Path: /Library/StartupItems/StartOuc
System Software:
          OS X 10.8 (12A269) - Uptime: 11 days 15:0
Disk Information:
          Hitachi HTS545050B9A302 disk0 : (500.11 GB)
                    disk0s1 (disk0s1) <not mounted>: 209.7 MB
                    Pandora (disk0s2) /: 499.25 GB (216.67 GB free)
                    Recovery HD (disk0s3) <not mounted>: 650 MB
          MATSHITADVD-R   UJ-8A8
USB Information:
          Apple Inc. FaceTime HD Camera (Built-in)
          Apple Inc. BRCM2070 Hub
                    Apple Inc. Bluetooth USB Host Controller
          Apple Inc. Apple Internal Keyboard / Trackpad
          Apple Computer, Inc. IR Receiver
FireWire Information:
Kernel Extensions:
          com.google.filesystems.fusefs          Version: 2.1.9
Problem System Launch Daemons:
                 [failed] com.apple.coresymbolicationd.plist
                 [failed] com.apple.emond.aslmanager.plist
Problem System Launch Agents:
                 [failed] com.apple.afpstat.plist
                 [failed] com.apple.KerberosHelper.LKDCHelper.plist
                 [failed] com.apple.scopedbookmarkagent.xpc.plist
Launch Daemons:
                 [loaded] com.bombich.ccc.plist
                 [loaded] com.microsoft.office.licensing.helper.plist
                 [loaded] com.mysql.mysql.plist
                 [loaded] com.parallels.desktop.launchdaemon.plist
                 [loaded] edu.washington.pop3.plist
                 [loaded] edu.washington.pop3s.plist
                 [loaded] org.macosforge.xquartz.privileged_startx.plist
Launch Agents:
                 [loaded] com.parallels.desktop.launch.plist
                 [loaded] com.parallels.DesktopControlAgent.plist
                 [loaded] com.parallels.vm.prl_pcproxy.plist
                 [loaded] com.wacom.wacomtablet.plist
User Launch Agents:
                 [loaded] com.c-command.SpamSieve.LaunchAgent.plist
                 [loaded] org.macosforge.xquartz.startx.plist
User Login Items:
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3rd Party Preference Panes:
          Apache
          Flash Player
          MacFUSE
          Macspoofer
          WacomTablet
Internet Plug-ins:
          Flash Player.plugin
          FlashPlayer-10.6.plugin
          iPhotoPhotocast.plugin
          JavaAppletPlugin.plugin
          net.juniper.DSSafariExtensions.plugin
          QuickTime Plugin.plugin
          SharePointBrowserPlugin.plugin
          Silverlight.plugin
          WacomNetscape.plugin
User Internet Plug-ins:
          WebEx.plugin
Bad Fonts:
          None
Top Processes:
          25.7 %          WebProcess
          7.3   %          pbs
          4.6   %          WindowServer
          2.4   %          coreservicesd
          1.7   %          EtreCheck
          1.6   %          Safari
          1.5   %          hidd
          0.3   %          mtmfs
          0.2   %          fontd
          0.2   %          prl_disp_service
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Since Mountain Lion Upgrade is my Internet connection very slow, Since Mountain Lion Upgrade is my Internet connection very slow

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why is the down load of mountain lion slow

HarrenBj wrote:
why is the down load of mountain lion slow
Many factors.
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Apple server load from others pondering the same question
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Physical health of your download platform or local network connection

I am having problems with mail after upgrading to mountain lion. Is there a way to go back to lion?

I am having problems with mail after upgrading to mountain lion. Is there a way to go back to lion?

It would always be easier to fix the Mail problems.

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Anybody had an issues with mail since upgrading to mountain lion? Can't get emails from one account, tried deleting and recreating but to no avail. Set up a new user and it works fine. Macbook pro 13" mid 2010 model.

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Why is Mail so slow on Mountain Lion?

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