Since upgrade for Yosemite, lost 60Hz in display PQ321QE?

Since i upgrade from Yosemite beta to final, i lost the ability of having my monitor PQ321QE working on 60Hz?
Now it only works on 30Hz, but is impossible work in this frame rate.
Please some one know whats up, and solutions?
Best regards

On the displays preference pane do you have it set on the option "Default for display"? What happens if you change it to scaled? Also did you check to see if the manufacturer of your display has updated drivers?
I hope this helps.
Paul

Similar Messages

Since upgrading to yosemite my MacBook Pro want detect my external display

Since upgrading to yosemite my macbook pro won't detect my external display ?

Here's an Apple Discussions thread that might help. It suggests using Disk Utility to repair permissions to fix the following issue, which I just found on my system:
User differs on “private/var/db/displaypolicyd”; should be 0; user is 244.
Group differs on “private/var/db/displaypolicyd”; should be 0; group is 244.
If Repair Permissions doesn't do the trick (because it doesn't stick across sleep and restarts), helpful user "lplacencia" has provided some Terminal commands to patch up the files as needed. With any luck a 10.10.1 update will address this soon!
I haven't had a chance to test this fix yet, but I will do so later tonight. Meanwhile I can report that booting up in Safe Mode didn't make any difference for me. My system includes MacPorts (which includes some running services) so I might need to eliminate that factor, if Disk Utility doesn't help.
A total clean install would have to be my next step. (And I might try that anyway just to see if it's a problem in Yosemite generally.) It's not possible to download the Yosemite full installer from Apple through a public website, but you can save the installer and use it to re-install without having to download it again.

Why does it take so long for my macbook to come to life when I open the cover, since upgrading to yosemite

Ever since upgrading to Yosemite it seems to take forever for my screen to come up when I open my MackBook Pro 13" (Mid 2010 model) I don't mean bouts I mean when I lift the screen.
Thanks
Ron

Have you contacted Gmail tech support and/or posted in their forums?
==============
Your system profile is a complete blank!!!!
When posting in Apple Communties/Forums/Message Boards.......It would help us to know which iMac model you have, which OS & version you're using, how much RAM, etc. You can have this info displayed on the bottom of every post by completing your system profile and filling in the information asked for.
CLICKY CLICK-----> Help us to help you on these forums
***This will help in providing you with the proper and/or correct solutions.***

Problem since upgrading to Yosemite: iMac wont boot up and simply displays a '?' symbol

my iMac has been slow since upgrading to Yosemite and has now stopped working completely - when I boot up all I get is this screen (for some reason picture has turned upside down when I uploaded) any ideas?

Startup – Computer Stops or Delays
Startup Issues - Resolve
Startup Issues - Resolve (2)
Startup Issues - Resolve (3)

Asked to Sign-in to iCloud every time I start my Mac since upgrading to Yosemite

Since upgrading to Yosemite every time I start my computer it goes through the normal grey screen stage and then I get to login as normal. After logging in I then get asked to sign-in to iCloud. I sign-in successfully and agree to the terms and conditions, choose to upgrade to iCloudDrive and then it says setting up my Mac, which takes about 20 seconds before the desktop displays. I'd expect this behaviour on the first reboot after installing Yosemite but it's asking me to sign-in to iCloud every time I restart and taking me through all these steps!
I'm on iMac, Late 2012, 2.9 GHz Intel Core i5, 8GB

Just to say I never found a solution to this after hours of looking for answers and trying different things. I finally decided to take the plunge and reformat my hard drive and reinstall OS X Yosemite and now is all good on this front.

Since upgrading to Yosemite on my iMac, My Mail app refuses to open, Safari won't load, and I can't upload pictures from my iPad... Please help, any ideas very welcome. I've had my iMac since 2011, and have never had any issues to deal with before..

Since upgrading to Yosemite on my iMac: My Mail app refuses to open, Safari won't load, and I can't upload pictures from my iPad...
Please help, any ideas very welcome. I've had my iMac since 2011, and have never had any issues to deal with before..
Thanks

29/11/2014 20:17:01.315 com.apple.xpc.launchd[1]: (jp.buffalo.NASPower)
Service only ran for 11 seconds. Pushing respawn out by 49 seconds.
29/11/2014 20:17:37.013 com.apple.backupd[616]: Finished scan
29/11/2014 20:17:43.108 com.apple.backupd[616]: Saved event cache at
/Volumes/Time Machine Backups/Backups.backupdb/Geoff Lambrechts’s iMac
(2)/2014-11-29-200648.inProgress/9B453663-603F-40B8-AC21-24F05C724E15/.6162AD34- 38F8-30AB-98E0-4A22FB9D311F.eventdb
29/11/2014 20:17:43.207 com.apple.backupd[616]: Not using file event
preflight for Macintosh HD
29/11/2014 20:18:01.561 com.apple.xpc.launchd[1]: (jp.buffalo.NASPower)
Service only ran for 11 seconds. Pushing respawn out by 49 seconds.
29/11/2014 20:18:16.288 com.apple.xpc.launchd[1]:
(com.apple.quicklook[715]) Endpoint has been activated through legacy
launch(3) APIs. Please switch to XPC or bootstrap_check_in():
com.apple.quicklook
29/11/2014 20:18:23.705 com.apple.SecurityServer[56]: Session 100013 created
29/11/2014 20:18:32.046 mdworker[718]: code validation failed in the
process of getting signing information: Error Domain=NSOSStatusErrorDomain
Code=-67062 "The operation couldn’t be completed. (OSStatus error -67062.)"
29/11/2014 20:19:01.662 com.apple.xpc.launchd[1]: (jp.buffalo.NASPower)
Service only ran for 11 seconds. Pushing respawn out by 49 seconds.
29/11/2014 20:19:45.458 com.apple.xpc.launchd[1]:
(com.apple.imfoundation.IMRemoteURLConnectionAgent) The
_DirtyJetsamMemoryLimit key is not available on this platform.
29/11/2014 20:19:59.123 com.apple.xpc.launchd[1]:
(com.apple.PubSub.Agent[725]) Endpoint has been activated through legacy
launch(3) APIs. Please switch to XPC or bootstrap_check_in():
com.apple.pubsub.ipc
29/11/2014 20:19:59.123 com.apple.xpc.launchd[1]:
(com.apple.PubSub.Agent[725]) Endpoint has been activated through legacy
launch(3) APIs. Please switch to XPC or bootstrap_check_in():
com.apple.pubsub.notification
29/11/2014 20:20:01.138 com.apple.xpc.launchd[1]: (jp.buffalo.NASPower)
Service only ran for 10 seconds. Pushing respawn out by 50 seconds.
29/11/2014 20:21:01.484 com.apple.xpc.launchd[1]: (jp.buffalo.NASPower)
Service only ran for 10 seconds. Pushing respawn out by 50 seconds.
29/11/2014 20:21:13.430 com.apple.backupd[616]: Found 4529 files (1.1 GB)
needing backup
29/11/2014 20:21:18.786 com.apple.backupd[616]: 2.82 GB required (including
padding), 1.24 TB available
29/11/2014 20:21:31.775 Console[734]: Failed to connect (_consoleX) outlet
from (NSApplication) to (ConsoleX): missing setter or instance variable
29/11/2014 20:21:34.230 WindowServer[162]: disable_update_timeout: UI
updates were forcibly disabled by application "Console" for over 1.00
seconds. Server has re-enabled them.
29/11/2014 20:21:36.898 WindowServer[162]: common_reenable_update: UI
updates were finally reenabled by application "Console" after 3.67 seconds
(server forcibly re-enabled them after 1.00 seconds)
29/11/2014 20:21:36.971 coreservicesd[83]: SFLEntryBase::ListHasChanged
mach_msg returned 10000004d
29/11/2014 20:22:01.817 com.apple.xpc.launchd[1]: (jp.buffalo.NASPower)
Service only ran for 10 seconds. Pushing respawn out by 50 seconds.
29/11/2014 20:23:02.170 com.apple.xpc.launchd[1]: (jp.buffalo.NASPower)
Service only ran for 10 seconds. Pushing respawn out by 50 seconds.
29/11/2014 20:24:02.547 com.apple.xpc.launchd[1]: (jp.buffalo.NASPower)
Service only ran for 10 seconds. Pushing respawn out by 50 seconds.
29/11/2014 20:25:02.168 CalendarAgent[218]:
[Refusing to parse response
to PROPPATCH because of content-type: .]
29/11/2014 20:25:02.233 CalendarAgent[218]:
[Refusing to parse response
to PROPPATCH because of content-type: .]
29/11/2014 20:25:02.236 CalendarAgent[218]:
[Refusing to parse response
to PROPPATCH because of content-type: .]
29/11/2014 20:25:02.284 CalendarAgent[218]:
[Refusing to parse response
to PROPPATCH because of content-type: .]
29/11/2014 20:25:03.059 com.apple.xpc.launchd[1]: (jp.buffalo.NASPower)
Service only ran for 10 seconds. Pushing respawn out by 50 seconds.
29/11/2014 20:25:12.674 com.apple.xpc.launchd[1]:
(com.apple.imfoundation.IMRemoteURLConnectionAgent) The
_DirtyJetsamMemoryLimit key is not available on this platform.
29/11/2014 20:26:03.464 com.apple.xpc.launchd[1]: (jp.buffalo.NASPower)
Service only ran for 10 seconds. Pushing respawn out by 50 seconds.
29/11/2014 20:27:03.841 com.apple.xpc.launchd[1]: (jp.buffalo.NASPower)
Service only ran for 10 seconds. Pushing respawn out by 50 seconds.
On 29 November 2014 at 19:29, Apple Support Communities Updates <

Slow since upgrading to yosemite

Hello I'm a new mac user and need some info.
I noticed that my mac is a bit slower since upgrading to Yosemite.
I get to see many times when opening an app the spinning colourful ball.
I did an etrecheck since i read on an over discussion that this might help resolving my problem.
Thank you
Problem description:
Slow since upgrading to Yosemite
EtreCheck version: 2.1.8 (121)
Report generated March 28, 2015 at 3:10:32 PM GMT+2
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
    iMac (21.5-inch, Late 2012) (Technical Specifications)
    iMac - model: iMac13,1
    1 2.7 GHz Intel Core i5 CPU: 4-core
    8 GB RAM Upgradeable
        BANK 0/DIMM0
            4 GB DDR3 1600 MHz ok
        BANK 1/DIMM0
            4 GB DDR3 1600 MHz ok
    Bluetooth: Good - Handoff/Airdrop2 supported
    Wireless: en1: 802.11 a/b/g/n
Video Information: ℹ️
    NVIDIA GeForce GT 640M - VRAM: 512 MB
        iMac 1920 x 1080
System Software: ℹ️
    OS X 10.10.2 (14C1514) - Time since boot: 0:21:45
Disk Information: ℹ️
    APPLE HDD HTS541010A9E662 disk0 : (1 TB)
        EFI (disk0s1) <not mounted> : 210 MB
        Macintosh HD (disk0s2) / : 999.35 GB (793.45 GB free)
        Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
USB Information: ℹ️
    Apple Inc. FaceTime HD Camera (Built-in)
    Apple Inc. BRCM20702 Hub
        Apple Inc. Bluetooth USB Host Controller
Thunderbolt Information: ℹ️
    Apple Inc. thunderbolt_bus
Configuration files: ℹ️
    /etc/hosts - Count: 43
Gatekeeper: ℹ️
    Mac App Store and identified developers
Launch Agents: ℹ️
    [not loaded]    com.adobe.AAM.Updater-1.0.plist [Click for support]
Launch Daemons: ℹ️
    [loaded]    com.adobe.fpsaud.plist [Click for support]
    [loaded]    com.adobe.SwitchBoard.plist [Click for support]
User Launch Agents: ℹ️
    [loaded]    com.adobe.AAM.Updater-1.0.plist [Click for support]
User Login Items: ℹ️
    iTunesHelper    Application (/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)
    uTorrent    UNKNOWN (missing value)
    Dropbox    UNKNOWN (missing value)
Internet Plug-ins: ℹ️
    FlashPlayer-10.6: Version: 17.0.0.134 - SDK 10.6 [Click for support]
    Flash Player: Version: 17.0.0.134 - SDK 10.6 [Click for support]
    QuickTime Plugin: Version: 7.7.3
    Default Browser: Version: 600 - SDK 10.10
3rd Party Preference Panes: ℹ️
    Flash Player [Click for support]
    Growl [Click for support]
Time Machine: ℹ️
    Time Machine not configured!
Top Processes by CPU: ℹ️
         1%    WindowServer
         0%    fontd
         0%    com.apple.WebKit.WebContent
         0%    AppleSpell
         0%    dpd
Top Processes by Memory: ℹ️
    283 MB    com.apple.WebKit.WebContent
    120 MB    mds_stores
    112 MB    Safari
    77 MB    Finder
    60 MB    WindowServer
Virtual Memory Information: ℹ️
    5.60 GB    Free RAM
    1.71 GB    Active RAM
    477 MB    Inactive RAM
    795 MB    Wired RAM
    1.15 GB    Page-ins
    0 B    Page-outs
Diagnostics Information: ℹ️
    Mar 28, 2015, 02:48:11 PM    Self test - passed
    Mar 26, 2015, 10:11:19 PM    /Library/Logs/DiagnosticReports/Loader_2015-03-26-221119_[redacted].cpu_resourc e.diag [Click for details]

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.

Computer randomly shuts down/Very unstable since upgrade to yosemite

Since upgrading to yosemite my computer has become very unstable.
For anyone that can help with what may be causing this issue I would really
appreciate it. As for "Adobe" being a possible cause, how can I determine
which Adobe program and related files are the culprit?
Thank you very much to anyone who offer's their support and help.
EtreCheck version: 2.1.8 (121)
Report generated February 10, 2015 at 12:59:00 PM MST
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 209
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: 0:9:57
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 (62.33 GB free)
            Core Storage: disk0s2 319.21 GB Online
    MATSHITADVD-R   UJ-8A8
USB Information: ℹ️
    Apple Computer, Inc. IR Receiver
    Apple Inc. FaceTime HD Camera (Built-in)
    Apple Inc. BRCM2070 Hub
        Apple Inc. Bluetooth USB Host Controller
    Apple Inc. Apple Internal Keyboard / Trackpad
Thunderbolt Information: ℹ️
    Apple Inc. thunderbolt_bus
Configuration files: ℹ️
    /etc/hosts - Count: 15
Gatekeeper: ℹ️
    Mac App Store and identified developers
Kernel Extensions: ℹ️
        /Library/Application Support/Roxio
    [not loaded]    com.roxio.TDIXController (1.7) [Click for support]
        /System/Library/Extensions
    [loaded]    com.manycamllc.driver.ManyCamDriver (0.0.9 - SDK 10.5) [Click for support]
    [not loaded]    com.paceap.kext.PACESupport (5.4) [Click for support]
    [not loaded]    com.paceap.kext.PACESupport2 (5.4) [Click for support]
    [loaded]    com.rim.driver.BlackBerryUSBDriverInt (0.0.74) [Click for support]
    [not loaded]    com.rim.driver.BlackBerryUSBDriverVSP (0.0.74) [Click for support]
    [not loaded]    com.symantec.kext.ips (1.3.1f6) [Click for support]
Launch Agents: ℹ️
    [not loaded]    com.adobe.AAM.Updater-1.0.plist [Click for support]
    [not loaded]    com.adobe.CS5ServiceManager.plist [Click for support]
    [not loaded]    com.epson.eventmanager.agent.plist [Click for support]
    [loaded]    com.google.keystone.agent.plist [Click for support]
    [not loaded]    com.rim.BBAlbumArtCacher.plist [Click for support]
Launch Daemons: ℹ️
    [loaded]    com.adobe.fpsaud.plist [Click for support]
    [loaded]    com.adobe.SwitchBoard.plist [Click for support]
    [loaded]    com.google.keystone.daemon.plist [Click for support]
    [loaded]    com.macpaw.CleanMyMac2.Agent.plist [Click for support]
    [loaded]    com.microsoft.office.licensing.helper.plist [Click for support]
    [failed]    com.parallels.mobile.kextloader.launchdaemon.plist [Click for support]
    [running]    com.rim.BBDaemon.plist [Click for support]
    [running]    com.smithmicro.schedulerdaemon.plist [Click for support]
User Launch Agents: ℹ️
    [loaded]    com.adobe.AAM.Updater-1.0.plist [Click for support]
    [failed]    com.avast.home.userinit.plist [Click for support]
    [loaded]    com.divx.agent.postinstall.plist [Click for support]
    [not loaded]    com.facebook.videochat.[redacted].plist [Click for support]
    [loaded]    com.macpaw.CleanMyMac2Helper.scheduledScan.plist [Click for support]
    [loaded]    com.macpaw.CleanMyMac2Helper.trashWatcher.plist [Click for support]
    [not loaded]    com.smithmicro.cleaning.schedulermailer.plist [Click for support]
User Login Items: ℹ️
    Google Chrome    Application Hidden (/Applications/Google Chrome.app)
    BlackBerry Device Manager    Application (/Library/Application Support/BlackBerry/BlackBerry Device Manager.app)
Internet Plug-ins: ℹ️
    FlashPlayer-10.6: Version: 16.0.0.305 - SDK 10.6 [Click for support]
    Default Browser: Version: 600 - SDK 10.10
    Flash Player: Version: 16.0.0.305 - SDK 10.6 [Click for support]
    QuickTime Plugin: Version: 7.7.3
    DivXBrowserPlugin: Version: 2.2 [Click for support]
    o1dbrowserplugin: Version: 5.40.2.0 - SDK 10.8 [Click for support]
    Google Earth Web Plug-in: Version: 7.1 [Click for support]
    googletalkbrowserplugin: Version: 5.40.2.0 - SDK 10.8 [Click for support]
    JavaAppletPlugin: Version: 15.0.0 - SDK 10.10 Check version
Safari Extensions: ℹ️
    Open in Internet Explorer
    DivX Plus Web Player HTML5 <video>
3rd Party Preference Panes: ℹ️
    Flash Player [Click for support]
Time Machine: ℹ️
    Skip System Files: NO
    Mobile backups: ON
    Auto backup: YES
    Volumes being backed up:
        Macintosh HD: Disk size: 318.84 GB Disk used: 256.51 GB
    Destinations:
        Data [Network]
        Total size: 3.00 TB
        Total number of backups: 30
        Oldest backup: 2014-12-22 10:14:08 +0000
        Last backup: 2015-02-10 02:49:48 +0000
        Size of backup disk: Excellent
            Backup size 3.00 TB > (Disk size 318.84 GB X 3)
Top Processes by CPU: ℹ️
         7%    WindowServer
         1%    Google Chrome
         0%    opendirectoryd
Top Processes by Memory: ℹ️
    129 MB    Google Chrome
    103 MB    Safari
    90 MB    WindowServer
    73 MB    Spotlight
    64 MB    Finder
Virtual Memory Information: ℹ️
    81 MB    Free RAM
    1.50 GB    Active RAM
    1.41 GB    Inactive RAM
    1.05 GB    Wired RAM
    1.66 GB    Page-ins
    21 MB    Page-outs
Diagnostics Information: ℹ️
    Feb 10, 2015, 12:42:48 PM    Self test - passed
    Feb 9, 2015, 05:23:10 PM    /Library/Logs/DiagnosticReports/mdworker_2015-02-09-172310_[redacted].crash

A number of problems exist including the likelihood of system corruption as a result of using CleanMyMac.
It is not reasonable to expect a Mac to operate normally after using CleanMyMac. Like many ill-conceived "cleaning" utilities, it is capable of corrupting a Mac to the point that erasing it completely is the only practicable means of recovery. CleanMyMac is not the only example; it is merely popular due to marketing strategies that are as effective as they are intrusive.
There is no practicable way to reverse the effects of having used CleanMyMac2 other than to reinstall all affected files from backups or their original sources. Its developer's uninstallation instructions are ineffective despite their recent claims to the contrary. Only MacPaw, its developer, can know the reason for that, but I can think of two possibilities: either they are purposefully leaving components behind for reasons known only to them, or they simply don't know what they're doing. Neither one of those possibilities is particularly comforting for the user.
Reinstalling OS X alone will have no effect on either removing CleanMyMac or reversing the damage it is capable of inflicting upon a system.
Besides CleanMyMac2, garbage "cleaning" and "anti-virus" software exists, specifically "Avast", "Smith Micro", and "Symantec / Norton". Those products should not be installed on any Mac, because they convey no benefit and are only capable of creating or contributing to problems.
In addition, that Mac's Hosts file appears to have been modified. Fixing a modified Hosts file requires specific instructions. Apple Support Communities contributor and EtreCheck author etresoft recently added a User Tip discussing that concern, and how to correct it: Fixing a hacked /etc/hosts file
The recovery procedure that follows will obviate the need to correct all those separate problems and is likely to require the least amount of your time and interaction.
Follow the applicable recovery procedure below:
If you have a backup that you created prior to using CleanMyMac, now is the time to use it. For Time Machine, boot OS X Recovery, and at the Mac OS X Utilities screen, choose Restore from Time Machine Backup. Choose a date preceding the installation of CleanMyMac.
If you do not have a backup that predates the use of CleanMyMac, create one now. To do that read Mac Basics: Time Machine backs up your Mac.
The recovery procedure will require that you erase the Mac using OS X Recovery, and then create a new user whose contents will be empty. You will then be able to use Setup Assistant to migrate your essential documents including photos, music, work products and other essential files.
When doing so, select only your previous User account and do not select "Applications", "Computer and Network Settings" or "Other files and folders". De-select those choices.
Subsequent to using Setup Assistant, you will need to reinstall the essential software you may require, once again remembering to install software only from their original sources, and omitting all non-essential software.
To erase and install Yosemite read: OS X Yosemite: Erase and reinstall OS X
To migrate your essential documents read: OS X Yosemite: Transfer your info from a computer or storage device and follow the procedure under Transfer info from a Time Machine backup or other storage device.

Since upgrading to Yosemite no printers listed under Print

Since upgrading to Yosemite, i cannot use my HP Officejet Pro 8500. No printers are in fact listed under the Printer&Scan function. I cannot download drivers ! I reinstalled the printer, using old cd and checked HP site for help... Any suggestion ? Thank you

If the HP is connected to the Mac via USB cable, then open an application called System Information, which is located under the Utilities folder under Applications. With System Information open, you will see an entry called USB in the left column. Select this and the top right pane will show all the USB busses in your Mac. The HP should be listed under one of these busses. If not, then try another USB cable or another USB port on the Mac.
If the HP is connected via WiFi, then it will most likely use the Bonjour protocol to advertise itself on the local network. Safari has the ability to show Bonjour devices on the network, which you can enable via the Safari Preferences > Advanced > Bonjour. With the Bonjour bookmark selected the HP should be listed as a local printer. If you don't see the HP then check its network settings to ensure it is connected to your wireless router.

Since upgrading to Yosemite my old email address is showing in the middle of my screen and I can't remove it.

Since upgrading to Yosemite on my iMac I have my old email showing in a small grey box in the middle of my screen. I don't know how to remove it.

The address has now gone - all I needed was another restart. But it did take two attempts. Thanks for your interest. Have also found that the iMac is slower at the moment. Goodness only knows what else I will find when I restart other progs.

Since upgrading to Yosemite I can not run my airport express' without having to reset each of them every time I wish to use them. Does anyone know what the problem is?

I am running a 7 year old MacBook Pro 15. Since upgrading to Yosemite I can not run my airport express' without having to reset each of them every time I wish to use them. I did not have this problem with Mavericks OSX. Does anyone know what the problem is and is there a fix?

See
What is a kernel panic,
Technical Note TN2063: Understanding and Debugging Kernel Panics,
Mac OS X Kernel Panic FAQ,
Resolving Kernel Panics, and
Tutorial: Avoiding and eliminating Kernel panics for more details.

Is anyone having problems with apple mail since upgrading to Yosemite?

MacBook Pro 15", mid 2012 running Yosemite 10.10.1 - ever since upgrading to Yosemite, I have a problem with Apple Mail which is that the from address persists on my screen after I close the email. I have to quit mail and sometimes even restart to get rid of it. Has anyone else experienced this? Any ideas?

No, I mean it lingers when I close the email. What I've discovered since I posted earlier is that if I reopen the email and hover over the address in the actual email the one that is persisting goes away. Thank goodness, because it is very annoying. I am wondering if it is somehow intentional in the SW. Thank you for asking.

Since upgrading to Yosemite I can't upgrade I Photo.

Since upgrading to Yosemite I can't upgrade IPhoto. It gives me this error "This update is not available for this Apple ID either because it was bought by a different user or the item was refunded or cancelled."

Do SMC and PRAM reset and see what happens. Is your CD drive connected directly to the Mini? Perhaps it needs cleaning.

Can't open Word Excel or Powerpoint since upgrade to Yosemite

Since upgrading to Yosemite I am unable to open Word Excel and Powerpoint

I'm not sure if you exactly mean what you mean.
Are you not able to save an attachement or are you not able to download a file?
For the first case: is the attachement showing up in Mail? If so, what happens when simply clicking on the attachement?
For the second case: check your download-location configured in Safari to ensure you save to a directory available for write-access.

My MacBook is running very slowly since upgrading to Yosemite

My MacBook is running very slowly since upgrading to Yosemite I have lots of room on my hard disc. All applications are working but very slowly. Help!

When 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.

Since upgrade for Yosemite, lost 60Hz in display PQ321QE?

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