If I install Yosemite and find that the wifi problems are too bad, can I go back to Mountain Lion?

Almost everything I do on my MacBookPro requires a steady wifi connection. I have been reading all the horror stories about the wifi problems with Yosemite. I would like to install Yosemite, but would like to be able to go back to Mountain Lion if the problems are as extreme as I have been hearing.
Details: My Mac is 3 years old (Apple Care ran out 2 days ago!). I recently upgraded from 4GB of ram to 16GB.
Router is a Linksys E4200.
I have an Iphone-4s
My husband has an older MacBook running Lion.
I connect to an Epson Artisan 835 with wifi via my router
We have no need to have the Apple devices communicate with each other.
I am currently running an appliance in Virtual Box. One reason I want to move to Yosemite is to be able to run it in VMware Fusion instead.
Thanks.

Hi there CarylLynne,
If you upgrade to Yosemite, you should be able to use the following article to revert to the previously installed OS using Time Machine, named:
OS X Yosemite: Revert to a previous OS X version
Thank you for using Apple Support Communities.
Take care,
Sterling

Similar Messages

I recently upgraded to iPhoto 9.5 and find that the "burn" to CD function is found nowhere. Anyone else have this problem?

I recetly upgraded to iPhoto 9.5 and find that the "burn" function is not available. Has anyone else run into this issue and if so, what did you find? I know that one can burn from the "FInder" but I still want to burn in the iPhoto format.

It's been removed as Apple is no longer adding optical drives to it's computers. So to burn photos (not iPhoto compatible mini libraries) to a disk you need to export them to a folder on the Desktop via File ➙ Export ➙ File Export and burn that folder to disk via the Finder.
iPhoto 9.5 will not natively read disks created by previous versions.
The following is from this Apple document which describes how to convert the mini libraries on those disks so iPhoto can view them: iPhoto 9.5: Using iPhoto libraries saved to CD or DVD
iPhoto 9.5: Using iPhoto libraries saved to CD or DVD
Learn how to use iPhoto libraries that you saved to CD or DVD in earlier versions of iPhoto.
In iPhoto 9.5 you can use an earlier iPhoto library that you saved to CD or DVD. To do this, first copy the library to your hard drive. Then:
If your iPhoto library on your CD or DVD was created in iPhoto 8.0 or later, iPhoto 9.5 can upgrade your library when you double-click to open it.
If your iPhoto library on your CD or DVD was created in iPhoto 7.0 or earlier, you will first need to use the iPhoto Library Upgrader tool to prepare it for iPhoto 9.5.
UPDATE: Just went thru the process and the iPhoto Library Upgrader converted the library into a working library that iPhoto could open. However, if you want to import any of those photos into your working library you'll have to use the paid version of iPhoto Library Manager to copy the Events or album you want from the converted library into your working library. An extra 2 steps that we didn't have to do previously.
OT

I restore my iphone and all the original apps are gone how can i get back allof this

i restore my iphone all the original apps are gone how can i get back allof this

The org.that I've said is like the MSG.setting calendar maps safari ,iTunes ...and I can't sync coz my iPhone 3GS don't have a carrier, I don't know how to solve it.. But thanks to your advice !!

I installed Maverick It turns off for no reasons, makes Safari a miserable experience, and more. How can I get back to Mountain Lion?

Maverick is a mess, well up to MS at its best. i installed it over Mountain Lion on a base Air that initially came with Lion. The worst is when the screen suddenly goes blank. After a few times, i found tha tsimpy pressing the power button brought up the welcome screen which - after the password - took me back to where I was with no loss, bu tthe first time was horrible. Then WORD for MAC started behaving strangely, with normal operations simply not working - shading to copy or cut out, for instance. Click again and again, no shading - then suddenly it workds! Safari has similar issues. So too with other software downladed earlier. simply nothing works as well as all did under Mountain Lion.
So, I want to deep six Maverick and get back to Mountain Lion. I assume that if I use CONTROL R I will simply reload Maverick. Can I download Mountain Lion from the App Store and then ??? All the copying and such - a half day lost. Is there are easier way?
<Edited by Host>

It's Command-R, not Control-R. You won't lose your files or settings if you reinstall 10.9 this way. Why don't you give that a go before reverting to 10.8.
http://support.apple.com/kb/PH13871
Enjoyed the Sarah Palin crack, btw.

Why the files my program create are created twice each file double ? And why sometimes the files size are too small ?

My program is using Queue of type Uri to create Queue of urls and then i'm using webbrowser to navigate each Uri from the Queue in it's turn and get the url(html) source content and save it to the hard disk.
The problem is sometimes the text files on the hard disk are small like 90KB or 60KB and sometimes they are as they are suppose to be 300KB or 200KB.
This is a button click event where i'm calling two methods:
private void toolStripButton3_Click(object sender, EventArgs e)
GetHtmls();
CheckQueue();
This is the GetHtmls method code:
private Queue<Uri> myUrls = new Queue<Uri>();
private bool isBusy = false;
private void GetHtmls()
for (int i = 1; i < 49; i++)
adrBarTextBox.Text = sourceUrl + i;
targetHtmls = (combinedHtmlsDir + "\\Html" + i + ".txt");
Uri targetUri = new Uri(sourceUrl + i);
myUrls.Enqueue(targetUri);
sourceUrl contain website address: http://www.tapuz.co.il/forums2008/forumpage.aspx?forumid=393&pagenumber=
And i'm adding to it the numbers and create the pages.
And add them to the Queue.
THen the CheckQueue method:
Uri uri;
private void CheckQueue()
if (isBusy)
return; // We're downloading some page right now, don't disturb
isBusy = true; // OK, let's get started
if (myUrls.Count == 0) // No more pages to download, we're done
isBusy = false;
return;
uri = myUrls.Dequeue(); // Get one URL from queue
getCurrentBrowser().Navigate(uri);
It suppose to Navigate to each Uri(html address) in the Queue.
And the browser document completed event:
private void Form1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
// If page loaded completly then do something
int urlnumber = uri.ToString().IndexOf("pagenumber=");
string number = uri.ToString().Substring(urlnumber + 11);
int num = Int32.Parse(number);
targetHtmls = (combinedHtmlsDir + "\\Html" + num + ".txt");
StreamWriter writer = File.CreateText(targetHtmls);
writer.Write(getCurrentBrowser().DocumentText);
writer.Close();
isBusy = false; // We're done
CheckQueue(); // Check next page in queue
In the completed event i'm getting the page number and build the string for the text file then write the html source content to the text file.
In the end i have on my hard disk 48 text files.
The problems are:
1. Sometimes it seems like it's not finishing navigating to the current uri or maybe some other reason maybe server side problem and creating small size files with source content inside but not all the source content. Sometimes the text files size are each
file 99KB or 70KB and sometimes the size of them are about 300KB and 200KB and this is the right sizes 300KB 200KB.
2. The text files on my hard disk suppose to be 48 different files each file should contain the source if the html page of the 48 pages. But on my hard disk the 48 text files are duplicated for some reason.
This is the file on my hard disk:
Some of the files are 205KB 350KB 175KB and some of the files sizes are 85KB 94KB 35KB
Why some of the files it didn't navigated to the end or maybe didn't got all the source ?
And why it's making each second file the same like the one before ? It suppose to create 48 different files but i'm getting two identical files each navigation.

I solved it now.
This is what i did:
It's a bit slow process since i'm waiting for each page to be loaded into the webbrowser but it does the work.
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Collections;
using System.IO;
using System.Net;
namespace WindowsFormsApplication1
public partial class Form1 : Form
private string sourceUrl = "http://test.test";
private string htmlsTargetDirectory = "Test Htmls";
private string appDir = Path.GetDirectoryName(@"C:\Users\chocolade1972\AppData\Local\Test_Images\Test Images\Test Htmls");
private string combinedHtmlsDir;
private String targetHtmls;
private int counter = 1;
private StreamWriter w;
private string uri;
private bool htmlloaded = false;
public Form1()
InitializeComponent();
webBrowser1.ScriptErrorsSuppressed = true;
combinedHtmlsDir = Path.Combine(appDir, htmlsTargetDirectory);
if (!Directory.Exists(combinedHtmlsDir))
Directory.CreateDirectory(combinedHtmlsDir);
private void Form1_Load(object sender, EventArgs e)
GetHtmls();
timer1.Enabled = true;
private void GetHtmls()
uri = sourceUrl + counter;
targetHtmls = (combinedHtmlsDir + "\\Html" + counter + ".txt");
webBrowser1.Navigate(uri);
private void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
if (e.Url.ToString() == uri)
targetHtmls = (combinedHtmlsDir + "\\Html" + counter + ".txt");
htmlloaded = true;
StreamWriter writer = File.CreateText(targetHtmls);
writer.Write(webBrowser1.DocumentText);
writer.Close();
FileInfo fi = new FileInfo(targetHtmls);
var size = fi.Length;
w = new StreamWriter(combinedHtmlsDir + "\\test.txt", true);
w.WriteLine("File Size " + size);
w.Close();
private void timer1_Tick(object sender, EventArgs e)
if (htmlloaded == true)
uri = sourceUrl + counter;
myurls.Add(uri);
webBrowser1.Navigate(uri);
htmlloaded = false;
counter += 1;

After the recent update the entire browser, including menus, icons, and everything on the web page, are too small. Fonts are smaller, pics are smaller, zoom settings will not remain universal. Minimum font size will make text readable, but all pics are to

The new update has screwed up my browser settings, I cannot get them fixed and Im pissed because my computer is an eye-sore to read until this is fixed! EVERYTHING in the browser is smaller, fonts, menus, icons, web page content, pictures, tables, etc. I have set the minimum font in the settings and the text is just to a point where it is easily readable at the maximum size setting, but all the menus and icons are still tiny and hard to read. The last version I had installed worked fine with no add-ons needed. Everything fit the screen fine and was easily readable without modification. I want this version off my PC and I want the last version I had back on but I dont know what version it was!!!!!!! ARARGGGG
In fact, this stupid troubleshooting window that I am in filling out this form doesnt fit the page right at all, and edges of the text are cut off, so Im not even sure what some of these boxes are asking for!!

See [[Toolbars and page content appear too large after upgrading to Firefox 3]]
*Try to adjust the DPI setting, see http://kb.mozillazine.org/layout.css.dpi
*Try to set the pref layout.css.devPixelsPerPx to 2 on the about:config page.
To open the ''about:config'' page, type '''about:config''' in the location (address) bar and press the Enter key, just like you type the url of a website to open a website.
If you see a warning then you can confirm that you want to access that page.
If you need to increase (or decrease) the font size on websites then look at:
Default FullZoom Level - https://addons.mozilla.org/firefox/addon/6965
NoSquint - https://addons.mozilla.org/firefox/addon/2592

I've just installed Yosemite and find i cannot open iTunes. What should I do?

I cannot get iTunes to boot up.

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. Click Utilities, then Console in the icon grid.
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. Click the Clear Display icon in the toolbar. Then take one of the actions that you're having trouble with. Select any messages that appear in the Console window. Copy them 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 which is irrelevant to 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.

I've downloaded movies to my itunes but once they are finished they completely disappear. Also today I opened my itunes and over half of my music and movies that actually show up are gone. Can anyone give me some advice on this problem?

I have downloaded movies through itunes until the latest version came out. Now the movies will download and then disappear. Everything is up to date so I'm not sure what is wrong. Also I opened my itunes today and over half of my music is missing along with several of the movies that do play. Luckily I have all my music saved, but the movies are completely gone. Does anyone have some ideas that could help me?

There's a whole lot to read in your post, and frankly I have not read it all.
Having said that, this troubleshooting guide should help:
http://support.apple.com/kb/TS1538
In particular, pay attention to the mobile device support sections near the bottom, assuming you have already done the items above it.

I have Acrobat 8 standard, I can not create PDF file any more. It stopps after 10%. This is happen after I have trayed Acrobat IX prof. demo. I have unstalled and reinnstalled Acrobat 8, the same problem are there. Can sombody help me.

Problem to make PDF file, stopps after 10%?

Hey Tom,
Could you please tell me how have you been trying to create PDFs.
What exact error pops up on your screen when it stops after 10%?
Please specify more on what you mean by saying 'trayed Acrobat IX prof.demo' as I need to analyze what exactly is the trouble.
Hope to get your response.
Regards,
Anubha

I installed Yosemite and now my computer is slow when logging in. Also when I type my password the screen images are distorted. After that my home screen appears and everything seems normal. What can I do to fix this?

I installed Yosemite and now my computer is slow when logging in. Also when I type my password, a bar appears measuring the process and then all of a sudden the screen images are distorted. After that my home screen appears and everything seems normal. What can I do to fix this?
Here is what the etrecheck results are:
Problem description:
slow at start up, screen is distorted while logging in, it is fine after
EtreCheck version: 2.1.8 (121)
Report generated April 5, 2015 at 9:42:01 AM PDT
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, Early 2011) (Technical Specifications)
    MacBook Pro - model: MacBookPro8,1
    1 2.3 GHz Intel Core i5 CPU: 2-core
    4 GB RAM Upgradeable
        BANK 0/DIMM0
            2 GB DDR3 1333 MHz ok
        BANK 1/DIMM0
            2 GB DDR3 1333 MHz ok
    Bluetooth: Old - Handoff/Airdrop2 not supported
    Wireless: en1: 802.11 a/b/g/n
    Battery Health: Normal - Cycle count 297
Video Information: ℹ️
    Intel HD Graphics 3000 - VRAM: 384 MB
        Color LCD 1280 x 800
System Software: ℹ️
    OS X 10.10.2 (14C109) - Time since boot: 0:7:0
Disk Information: ℹ️
    Hitachi HTS545032B9A302 disk0 : (320.07 GB)
        EFI (disk0s1) <not mounted> : 210 MB
        Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
        Macintosh HD (disk1) / : 318.84 GB (174.85 GB free)
            Encrypted AES-XTS Unlocked
            Core Storage: disk0s2 319.21 GB Online
    MATSHITADVD-R   UJ-898
USB Information: ℹ️
    Apple Inc. Apple Internal Keyboard / Trackpad
    Apple Inc. BRCM2070 Hub
        Apple Inc. Bluetooth USB Host Controller
    Apple Inc. FaceTime HD Camera (Built-in)
    Apple Computer, Inc. IR Receiver
Thunderbolt Information: ℹ️
    Apple Inc. thunderbolt_bus
Gatekeeper: ℹ️
    Mac App Store and identified developers
Kernel Extensions: ℹ️
        /System/Library/Extensions
    [not loaded]    com.devguru.driver.SamsungComposite (1.1.0) [Click for support]
    [not loaded]    com.logmein.driver.LogMeInSoundDriver (1.0.3 - SDK 10.5) [Click for support]
        /System/Library/Extensions/ssuddrv.kext/Contents/PlugIns
    [not loaded]    com.devguru.driver.SamsungACMControl (1.1.0) [Click for support]
    [not loaded]    com.devguru.driver.SamsungACMData (1.1.0) [Click for support]
Startup Items: ℹ️
    HP Trap Monitor: Path: /Library/StartupItems/HP Trap Monitor
    Startup items are obsolete in OS X Yosemite
Problem System Launch Daemons: ℹ️
    [failed]    com.apple.ucupdate.plist
    [failed]    com.apple.watchdogd.plist [Click for details]
Launch Agents: ℹ️
    [not loaded]    com.google.keystone.agent.plist [Click for support]
    [not loaded]    com.hp.help.tocgenerator.plist [Click for support]
    [not loaded]    com.logmein.LMILaunchAgentFixer.plist [Click for support]
    [not loaded]    com.logmein.logmeingui.plist [Click for support]
    [not loaded]    com.logmein.logmeinguiagent.plist [Click for support]
    [not loaded]    com.logmein.logmeinguiagentatlogin.plist [Click for support]
Launch Daemons: ℹ️
    [not loaded]    com.adobe.fpsaud.plist [Click for support]
    [not loaded]    com.google.keystone.daemon.plist [Click for support]
    [not loaded]    com.logmein.logmeinblanker.plist [Click for support]
    [not loaded]    com.logmein.logmeinserver.plist [Click for support]
    [not loaded]    com.logmein.raupdate.plist [Click for support]
    [not loaded]    com.microsoft.office.licensing.helper.plist [Click for support]
User Launch Agents: ℹ️
    [not loaded]    com.adobe.ARM.[...].plist [Click for support]
    [not loaded]    com.facebook.videochat.[redacted].plist [Click for support]
    [not loaded]    com.google.GoogleContactSyncAgent.plist [Click for support]
User Login Items: ℹ️
    iTunesHelper    UNKNOWN Hidden (missing value)
    AdobeResourceSynchronizer    Application Hidden (/Applications/Adobe Reader.app/Contents/Support/AdobeResourceSynchronizer.app)
    Android File Transfer Agent    Application (/Users/[redacted]/Library/Application Support/Google/Android File Transfer/Android File Transfer Agent.app)
    HP Product Research    Application (/Library/Application Support/Hewlett-Packard/Customer Participation/HP Product Research.app)
    HPEventHandler    Application (/Library/Printers/hp/hpio/HPEventHandler.app)
Internet Plug-ins: ℹ️
    o1dbrowserplugin: Version: 5.40.2.0 - SDK 10.8 [Click for support]
    LogMeInSafari64: Version: 1.0.660 [Click for support]
    Default Browser: Version: 600 - SDK 10.10
    Silverlight: Version: 5.1.10411.0 - SDK 10.6 [Click for support]
    FlashPlayer-10.6: Version: 17.0.0.134 - SDK 10.6 [Click for support]
    LogMeIn: Version: 1.0.660 [Click for support]
    Flash Player: Version: 17.0.0.134 - SDK 10.6 [Click for support]
    LogMeInSafari32: Version: 1.0.660 [Click for support]
    QuickTime Plugin: Version: 7.7.3
    googletalkbrowserplugin: Version: 5.40.2.0 - SDK 10.8 [Click for support]
    AdobePDFViewer: Version: 10.0.1 [Click for support]
    SharePointBrowserPlugin: Version: 14.1.0 [Click for support]
    iPhotoPhotocast: Version: 7.0 - SDK 10.7
3rd Party Preference Panes: ℹ️
    Flash Player [Click for support]
Time Machine: ℹ️
    Time Machine not configured!
Top Processes by CPU: ℹ️
         7%    ocspd
         4%    WindowServer
         1%    kextd
         0%    ps
         0%    securityd
Top Processes by Memory: ℹ️
    137 MB    Microsoft Word
    120 MB    Safari
    86 MB    ocspd
    82 MB    CalendarAgent
    77 MB    WindowServer
Virtual Memory Information: ℹ️
    310 MB    Free RAM
    1.89 GB    Active RAM
    1.55 GB    Inactive RAM
    544 MB    Wired RAM
    1.13 GB    Page-ins
    8 KB    Page-outs
Diagnostics Information: ℹ️
    Apr 5, 2015, 09:32:47 AM    Self test - passed
    Apr 5, 2015, 09:30:05 AM    /Users/[redacted]/Library/Logs/DiagnosticReports/AdobeResourceSynchronizer_2015 -04-05-093005_[redacted].crash
    Apr 4, 2015, 01:12:41 PM    /Users/[redacted]/Library/Logs/DiagnosticReports/AdobeResourceSynchronizer_2015 -04-04-131241_[redacted].crash
    Apr 4, 2015, 08:13:57 AM    /Users/[redacted]/Library/Logs/DiagnosticReports/AdobeResourceSynchronizer_2015 -04-04-081357_[redacted].crash

Reinstalling OS X Without Erasing the Drive
Boot to the Recovery HD: Restart the computer and after the chime press and hold down the COMMAND and R keys until the menu screen appears. Alternatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.
Reinstalling OS X Without Erasing the Drive
Repair the Hard Drive and Permissions: Upon startup select Disk Utility from the main menu. Repair the Hard Drive and Permissions as follows.
When the recovery menu appears select Disk Utility and press the Continue button. After Disk Utility loads select the Macintosh HD entry from the the left side list. Click on the First Aid tab, then click on the Repair Disk button. If Disk Utility reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit Disk Utility and return to the main menu.
Reinstall OS X: Select Reinstall OS X and click on the Continue button.
Note: You will need an active Internet connection. I suggest using Ethernet if possible because it is three times faster than wireless.
Alternatively, see:
Reinstall OS X Without Erasing the Drive
Choose the version you have installed now:
OS X Yosemite- Reinstall OS X
OS X Mavericks- Reinstall OS X
OS X Mountain Lion- Reinstall OS X
OS X Lion- Reinstall Mac OS X
     Note: You will need an active Internet connection. I suggest using Ethernet
                 if possible because it is three times faster than wireless.

Has anyone downloaded Yosemite and found that there are no ore scroll bars? I have to move the window (of any window, Skype window, browser window etc.) in order to find the scroll bar and then it disappears so fast I can't even use it.

Has anyone downloaded Yosemite and found that there are no ore scroll bars? I have to move the window (of any window, Skype window, browser window etc.) in order to find the scroll bar and then it disappears so fast I can't even use it.

Not sure why that was unchecked but good to know!
Apple's new default (since at least a couple of OS releases back) is to have it off so OS X matches the behavior of an iPhone or iPad.
I almost never need a scroll bar, and when I do, I just move over to the edge of the window when scrolling and a larger scroll bar appears.
Yes, for the most part, users don't really need the scroll bar. That's what the scroll wheel on almost all mice is for. Saves the trip over to bar to physically grab and move it. But, I do like it on all the time regardless. That way (especially with a long article) I can just take a quick glance over to the bar to see about where I am on the page (a third of the way down? halfway?). Otherwise, I have to move the page just to make it appear to give me the same information.

I got CS4 software. When the first time i install, i chose the normal installation content. Then I found that there was no photoshop on the start menu. After that I try to put the disk into the notebook again and find that there is no photoshop listed on

I got CS4 software. When the first time i install, i chose the normal installation content. Then I found that there was no photoshop on the start menu. After that I try to put the disk into the notebook again and find that there is no photoshop listed on the "installation list"

download the cs4 design premium installation files and install ps using them,
Downloadable installation files available:
Suites and Programs: CC 2014 | CC | CS6 | CS5.5 | CS5 | CS4, CS4 Web Standard | CS3
Acrobat: XI, X | 9,8 | 9 standard
Premiere Elements: 13 | 12 | 11, 10 | 9, 8, 7 win | 8 mac | 7 mac
Photoshop Elements: 13 |12 | 11, 10 | 9,8,7 win | 8 mac | 7 mac
Lightroom: 5.7.1| 5 | 4 | 3
Captivate: 8 | 7 | 6 | 5.5, 5
Contribute: CS5 | CS4, CS3
Download and installation help for Adobe links
Download and installation help for Prodesigntools links are listed on most linked pages. They are critical; especially steps 1, 2 and 3. If you click a link that does not have those steps listed, open a second window using the Lightroom 3 link to see those 'Important Instructions'.

I have just finished installing Yosemite and wanted to backup my dasd. I could not find the "Execute Back uo Now" botton on the desktop anymore. Anyone can help me?

I have just finished installing Yosemite and wanted to backup my dasd. I could not find the "Execute Back uo Now" botton on the desktop anymore. Anyone can help me?

Just what is "dasd"
What backup program are you using?
Is it compatible with Yosemite?

I cannot send emails, only receive, after upgrade to Yosemite today, Apple should resolve this issue. Any help more than welcome. Thanks in response to Pita Fito I have contacted three more people that made the upgrade and they have the same problem

I cannot send emails, only receive, after upgrade to Yosemite today, Apple should resolve this issue. Any help more than welcome. Thanks
in response to Pita Fito
I have contacted three more people that made the upgrade and they have the same problem. My advise is not to upgrade until Apple solves the serious issue, I would hate to have to re-install Outlook...

I can send e-mails just fine with apple mail on yosemite...
Might not be a generic problem but rather a personal problem..
You should try find a fix rather than waiting on apple.
Hopefully somebody can help you out.
More than happy to help with your settings/preference pain... And compare mine with yours...
If you send some screenshots... I can send you my equivalent... So maybe you can figure it out.
Is it a gmail or icloud email acount? Can be of more help if it is.

16 mo young Mac Pro will not turn on. Dead. Why. No problems ever! Installed Yosemite and did not boot up after. Did that kill it? To young to die. What

16 mo young Mac Pro will not turn on. Dead. Why. No problems ever! Installed Yosemite and did not boot up after. Did that kill it? To young to die. What happened?what do I do now??????? Help!

Note that you don't have a Mac Pro as stated. Your profile says you have a MacBook Pro. Please clarify as they are entirely different computers. If nothing below works for you, then make a Genius Appointment and take it in for service.
Try these in order testing your system after each to see if it's back to normal:
1. a. Resetting your Mac's PRAM and NVRAM
    b. Intel-based Macs: Resetting the System Management Controller (SMC)
2. Restart the computer in Safe Mode, then restart again, normally. If this doesn't help, then:
     Boot to the Recovery HD: Restart the computer and after the chime press and hold down the
     COMMAND and R keys until the Utilities menu screen appears. Alternatively, restart the
     computer and after the chime press and hold down the OPTION key until the boot manager
     screen appears. Select the Recovery HD and click on the downward pointing arrow button.
3. Repair the Hard Drive and Permissions: Upon startup select Disk Utility from the Utilities menu. Repair the Hard Drive and Permissions as follows.
When the recovery menu appears select Disk Utility. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the main menu. Select Restart from the Apple menu.
4. Reinstall Yosemite: Reboot from the Recovery HD. Select Reinstall OS X from the Utilities menu, and click on the Continue button.
Note: You will need an active Internet connection. I suggest using Ethernet if possible because it is three times faster than wireless.

If I install Yosemite and find that the wifi problems are too bad, can I go back to Mountain Lion?

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