HDCP display issue with Yosemite and Macbook air

Hi - Sorry if the question has been asked before and answered.
I have an issue where since I have upgraded to Yosemite, I cannot play any of the movies I bought prior to upgrading and I can even play trailer from the iTunes store...
Any ideas?
Thanks

Too bad this didn't help.
HDCP errors can also occur when your display settings are incorrect and when you have non-original / non-Apple display software installed. Think a special driver to support a specific type of external display, or a remote viewer application like TeamViewer or AirParrot.
If you're having the HDCP error with an external display, disconnect it and test with the MacBook Air's own display.
If the issue persists on the MacBook Air's own display:
To restore your display settings to factory default: do a PRAM reset:
http://support.apple.com/kb/PH14222?viewlocale=en_US
Shut down your Mac.
Locate the following keys on the keyboard: Option, Command (⌘), P, and R. You will need to hold these keys down simultaneously in step 4.
Turn on your Mac.
Immediately press and hold the Option-Command-P-R keys. You must press this key combination before the gray screen appears.
Continue holding the keys down until your Mac restarts, and you hear the startup sound for the second time.
Release the keys.
If you have special software installed, it would be best to try to boot the computer to safe mode:
http://support.apple.com/kb/PH18760
Choose Apple menu > Shut Down.
After your Mac shuts down, wait 10 seconds, then press the power button.
Immediately after you hear the startup tone, hold down the Shift key.
You should press the Shift key as soon as possible after you hear the startup tone, but not before.
Release the Shift key when you see the gray Apple logo and progress indicator.
If that doesn't solve it, peruse your Applications folder in the Finder and see if you can delete unwanted video / viewing-related applications.

Similar Messages

HT3131 Are there any ventilation issues with running a macbook air in clamshell mode?

Are there any ventilation issues with running a macbook air in clamshell mode?

...that makes sense to me.
but, why do so many MBA users (on this forum and others) claim that ventilation occurs through the keyboard? Is this claim based on an old macbook design?
for example, here's a related discussion (although fairly old):
11-08-2010, 12:16 PM
#6 (permalink)
SP Forsythe
Notebook Evangelist
Join Date: Jul 2007
Location: California
Posts: 660
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Re: Is it safe to use MBP with screen lid closed? Leave charge on always?
Quote:
Originally Posted by tHE j0KER
Actually I you shouldn't close the lid while running on an external screen. The keyboard of the Macbook is an air intake for the fan. Close the lid, and it could overheat.
A common misconception of unknown origin. The intake and the exhaust for the cooling fan on the 13" MB and MBP are both located on the rear slot at the base of the hinge. In fact, you can actually see the divider that separates the intake flow from the output flow. If it were through the keyboard crevices, then an awful lot of overheats would result from people using impermeable keyboard covers, as well as Apple's warranty department would be flipping out over the Apple store carrying such covers. iSkin ProTouch FX Keyboard Cover for all MacBooks - Black Printed Keys on White - Apple Store (U.S.)
Does one think that Apple sells these only for use when the Notebook is off??? http://store.apple.com/us/product/TW...co=MTM3OTUwMDE Closing the lid, whilst operating the unit actually results in cooler operation due to reduction in power consumed by operating the display, which in supporting the on-board display generates heat far greater than simply powering the video port..
Does one think that Apple sells these for use only when the MacBook is off? http://store.apple.com/us/product/TW...co=MTM3OTUwMDEApples direction for use is specifically for when using with an external display.
Currently using:
Apple MacBook Air 13" mid 2011 1.8GHz Core i7 4GB 256 GB SSD Lion & Ubuntu Linux via Fusion
MacBook Air 11.6" late 2010 1.6 GHZ, 320M, 4GB 180 GB SSD Upgraded OWC), OS X Lion
11-08-2010, 02:34 PM
#7 (permalink)
ajreynol
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Re: Is it safe to use MBP with screen lid closed? Leave charge on always?
once again, I've tried a few of these keyboard covers. the Moshi keyboard cover is the ONLY one I can recommend. the others are too thick or change the keyboard experience too much.
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11-08-2010, 03:34 PM
#8 (permalink)
doh123
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Re: Is it safe to use MBP with screen lid closed? Leave charge on always?
1. Closing the cover will cause more heat. This is not because of covering the keyboard very much (though it does help some heat be retained). It's mainly because of the shape of the hinge and the fact when closed it covers up the back vent a lot more. For the best cooling, it is best to have the screen open. Just run it as a dual monitor, but make the external the Primary monitor, and if you don't want to use the built in, just turn its backlight off and don't use it.
2. The thing you plug into the wall is not a battery charger. The actual "charger" is built into the computer. It knows when to charge and when not to. If the little light on the power plug is amber, then its charging your battery. When its green, its just powering the laptop and NOT charging your battery at all.
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(We do exist!)
Wineskin 2.5 is available!. Turn Windows apps into Mac apps for free!
11-08-2010, 03:38 PM
#9 (permalink)
Wolfpup
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Re: Is it safe to use MBP with screen lid closed? Leave charge on always?
I'd leave the lid open, at least partially...yes it may be fine not doing that, but you are making heat dissipate worse, of course could even theoretically hurt the screen.
As for the battery...well there's really only two choices, have it plugged in or not. As others mentioned, you can't overcharge the battery. It can be damaged a bit from heat, but of course the number one thing that's going to damage it is discharging it...so it's a no brainer-use it plugged in whenever possible, and try to charge it whenever possible when it's not plugged in.
11-08-2010, 03:45 PM
#10 (permalink)
SP Forsythe
Notebook Evangelist
Join Date: Jul 2007
Location: California
Posts: 660
Rep Power: 14
Re: Is it safe to use MBP with screen lid closed? Leave charge on always?
Quote:
Originally Posted by doh123
1. Closing the cover will cause more heat. This is not because of covering the keyboard very much (though it does help some heat be retained). It's mainly because of the shape of the hinge and the fact when closed it covers up the back vent a lot more. For the best cooling, it is best to have the screen open. Just run it as a dual monitor, but make the external the Primary monitor, and if you don't want to use the built in, just turn its backlight off and don't use it.
Nope. Apple would disagree with you on that one. Any "closure", which is, when compared to the amount of CFM, is insignificant. In fact, the opening size remains the same. it is only deflected at a slight angle when the lid is closed. Tilt your MBP and see. As well, shutting down the display lowers the heat being generated, even in the lower case. As I said, if it were a problem, Apple would not be selling stands designed to operate your unit in the closed position as the original poster of this thread proposes to do.
Currently using:
Apple MacBook Air 13" mid 2011 1.8GHz Core i7 4GB 256 GB SSD Lion & Ubuntu Linux via Fusion
MacBook Air 11.6" late 2010 1.6 GHZ, 320M, 4GB 180 GB SSD Upgraded OWC), OS X Lion

Apple TV 2 choppy video playback when mirroring from Macbook Pro (Yosemite) and Macbook Air (Yosemite) but not iOS devices

Video playback is choppy (cuts out every 30-45 seconds) when air playing from both my MacBook Air 1.3 GHz Intel Core i5 running Yosemite and my husbands new MacBook Pro, but runs perfectly when mirroring from any of our iOS devices (iPhone 6+, iPad mini 3, etc.) We have Apple TV 2. This problem just started a few weeks ago, was working fine around Christmas. The problem seems to have coincidentally started right after our son tried plugging in and setting up his Chromecast on our tv. I disconnected the Chromecast, but we still have the problem. All of our software if up to date and I've tried disconnecting blue tooth, we do not have a microwave and our wifi network has a very strong signal. We have an Airport Extreme base station. Is there a solution to our problem?

Hi leahmturner,
I see that you are experiencing an issue with choppiness while AirPlay Mirroring from your computers to your Apple TV. I have an article that contains some helpful troubleshooting steps for you regarding this issue:
About AirPlay Mirroring in OS X - Apple Support
http://support.apple.com/en-us/HT201343
Optimizing image quality
Resolution matching modes
You can choose between two desktop resolution matching modes that let you select which display will have the best image. When AirPlay Mirroring is turned on, select an option under "Match Desktop Size To:" in the AirPlay Mirroring menu extra.
Match Desktop Size To: Apple TV
AirPlay Mirroring changes the desktop resolution to best match your Apple TV, resulting in a 16:9 image that fills the HDTV screen. This setting often produces the sharpest image on the HDTV. The aspect ratio and/or resolution of the built-in Mac display may change to accommodate the Apple TV.
Match Desktop Size To: This Mac
AirPlay Mirroring scales the contents of the desktop to fit on the Apple TV, leaving the resolution of your Mac's display unchanged. Use this setting for the sharpest image on your Mac's display. Depending on your Mac model, the resulting image may not fill the HDTV screen.
Troubleshooting AirPlay Mirroring
If you don't see mirroring options
If your Mac and Apple TV are on the same network, but no AirPlay Mirroring menu appears, your Apple TV may be asleep. Simply press a button on your Apple TV remote to wake it up. After a few seconds, the AirPlay Mirroring menu extra appears. If you still don't see the options you expect, make sure your Apple TV has the current software update installed. Also make sure that you have the "Show mirroring options in the menu bar when available" option selected in the Displays pane of System Preferences.
If the menu bar or Dock is cropped
Some HDTVs have bezels that cover a small percentage of the screen. This can result in a slight cropping of a full-resolution HDTV image. Depending on the HDTV model, AirPlay Mirroring may automatically adjust the picture size to prevent cropping. If you are using OS X Mountain Lion or later, and you see cropping of the menu bar or Dock when using AirPlay Mirroring, toggle the Overscan correction option in Displays preferences.
Minimize video post-processing
HDTVs often apply picture quality enhancements intended to improve the look of film and video sources. In some cases, these enhancements can lead to over-sharpening artifacts when displaying your Mac desktop. Some HDTV models have built-in settings to change or disable the enhancements for use with a computer (computer, presentation, or game modes). Otherwise, the controls for sharpness, detail enhancement and noise reduction can be used to optimize the appearance of the Mac desktop. Consult your HDTV’s manual for guidance on the appropriate settings for use with a computer.
Firewall security settings
If you use a firewall, make sure the following firewall security options have been set to allow AirPlay Mirroring to work:
Choose System Preferences from the Apple menu ().
Click Security & Privacy, then click Firewall.
Click the lock icon to unlock it if it's locked, then type an administrator name and password.
Click Firewall Options.
Deselect (uncheck) the “Block all incoming connections” checkbox.
Select (check) the “Automatically allow signed software to receive incoming connections” checkbox.
Thanks for coming to the Apple Support Communities!
Regards,
Braden

Issues with Yosemite and Safari on extended monitors

I have Yosemite installed on a Mac Pro with 3 monitors attached to it. As soon as I installed Yosemite, I noticed that whenever I tried to fill in text input fields on a web page, the things I typed in would start blinking. And when trying to backspace to correct any typing errors, the field would remain the same and continue blinking. It was very annoying because it was very difficult to enter anything into text input fields.
My brother and an officemate who also had Yosemite installed on their computers were not experiencing this issue so I tried to isolate the problem on my system. What I discovered is that Safari behaves as it should when it is displayed on my main monitor. But whenever I move the Safari window over to one of the other monitors, any text input field on a web page would be next to impossible to type text into. Other input fields, such as dropdown list boxes, act weird also.
I should add that this only happens with Safari. Firefox and Chrome do not behave this way on any of the monitors. Other apps also run fine on the extended monitors. It's just Safari that misbehaves.
Has anybody else experienced this problem. Is this a known bug? I tried doing a search here in this community and on the internet itself but have not found anybody else complain about this issue.
Thanks.
...Leo

Hi all, I too am expieriencing similar issues.
I am running a 2012 6core 3.33 Mac Pro with two ATI Radeon cards driving 3 27" LCD Cinema Displays. One of the Radeo cards (1) drives the outer 2 screens and the other card (2) drives the centre screen alone.
I upgraded from Mavericks to Yosemite 10.10.01 after being very pleased with it running on my Macbook Pro for a few weeks.
My center screen had issues immediately rendering certain pages in Safari, the App Store and Mail. In particular the google page when it has live search results showing, the App Store updates page also renders badly, and some emails in Mail that are html also don't load as the should. Generally its the top of the page flashing, or the text input box on a page like this thats effected.
I did a fresh install of Yosemite and it didn't fix the problem.
I notice when I drag my safari window from the outer screen to either of the side screens, the problem goes away and returns when it comes back to the centre screen. I swapped over the mini display ports so that graphics card 1 drives the middle screen and graphics card 2 drives the outer screens and the problem moved to the outer screens.
I am still on Applecare so I called Apple and a senior tech took a look at the issue on my screen remotely. He decided on replacing the graphics card. This is being sent now so I report back once its installed to let you know if it made a difference.
I am also going to try swapping out one of my cards with another colleagues card to see if I can establish if its a bug in Yosemite or an issue with a specific ATI card, or indeed just a problem when you run two cards.
In the mean time I would be interested to hear if any of you guys found a workaround.

Strange keyboard issues with my 2012 Macbook Air...

Hey guys,
I've been using my brand new macbook air for the last 2 weeks or so without any issues. Today I took my laptop out of my bag after work and noticed that things on the keyboard have been really weird. For starters, certain keys on the right side of the board are not giving me the correct symbols when I press them. There are a few other random keys (mostly the numbers and symbols) that are incorrect.
ie: I press shift+2 for the @ but I get ' instead or I press ] and get @ instead.
Another weird thing to note: Caps lock turned on = lower case letters and Caps lock turned off = upper case letters.
I left my laptop alone for a few hours and when I came back to it later, whenever I turn it on it automatically boots into safe mode which makes me assume that the shift key is stuck in some weird way.
What can be causing this?

I have about the exact same problem, my macbook air 13 in (bought january this year in Belgium) is having the same issues, first (i'm on an azerty keyboard - first the following keys stopped working ; . : / and a week a half after that almost the whole keyboard gave up, symptoms
lowercase c reacts like the enter key
lowercase v types ^V
the whole row of keys from a tot Z don't work or produce garabage like ´^VVVVV1111111111
numerical keys work, but using shift together does not
If I attach an external keyboard, then the same key mismappings or whatever happening here, are also on the external keyboard, so I can't even login with an external keyboard
Sounds like hardware failure, but no idea why, my macbook is in top condition, no spills, no high humidty, really nothing whatsoever
If any one would have a clue prior to bringing it to mac store?
All defaults already done (smc - pram reset), reboot to recovery terminal there same problem with internal and external keyboard, boot from usb etc etc
For me really really really dissappointing, bought the top model macbook air with all upgrades available, as a stable working laptop for business use (for which I payed premium for a premium device) , but stuff like this happens on cheap windows consumer laptops, not on a macbook air
I have about everything over here, 2 Iphones, 3 Ipad's, an Imac, a MacPro, a Macbook Pro, each and every one of the durable and decent devices but this macbook air has been nothing to be excited about untill now, lots of blowing fans all the time, run's quite hot, the touchpad having it's on will
Always been a very loyal Apple customer as the list of Mac devices above shows, but things like this make me reconsider
Best Regards
Nico

Will the Cinema Display work with an older MacBook Air?

My wife has an older MacBook Air (circa late 2009) with one USB 2.0 port and one Mini Display port. Will the Cinema display work with this model Air?

It looks to me like the cinema display is a DVI connection. If you have a MiniDisplay port to DVI adapter that connected the MBpro to the display then you have everything you need. (plus a DVI cable). The MDP adapter plugs into the Thunderbolt port of the MBair.

Airport Express 802.11n keeps disconnecting Airplay with iPhone and Macbook Air

I purchased this Airport Express on Jan 7, 2012. It was working fine.
I used it for airplay only to play my itunes music to my speakers. My speakers are connected to an amplifier that is inturn connected to the Airport Express via an optical cable. I have not use it with a printer. I do not use it as a wifi to access the internet.
It was working fine until about a month or so ago when after playing a few songs it would disconnect. Now after less than 2-3mins it would disconnect. When I try to manually reconnect with my iPhone or Macbook Air, it would say that is unable to connect to the Airport.
If I keep trying, eventually it will connect and then after 2-3 mins it would cut off again. The amber light would show contineously.
I am at wits end. I have not changed the arrangement at all since Jan. What could have happened?
About a month ago there were an update to Airport Utility. I ran that update. Could that be the problem?
I'd appreciate if someone could help me. The warranty will run out a less than a month. How timely isn't it.
Is the router broken. If so why does it still allow me to use Airplay but only for a few minutes (less than a song)?
Thanks in advance for any help and or advice.
Mike

Unfortunately there could be any number of possible causes. Your router could be at fault, or the Express, or something else that is affecting both. To troubleshoot this issue you would have to eliminate or significantly reduce one or more of these possibilities.
Try performing a "hard reset" of the Express and configure it anew. Sometimes an internal parameter becomes corrupted that only a "hard reset" can fix.
The following is an excerpt from:
Resetting an AirPort Base Station or Time Capsule FAQ
Hard reset
Press and hold the reset button with a pen or pencil until you see the status light (LED) start to flash amber rapidly, which should occur after about five seconds.
Release the button, and the AirPort Base Station or Time Capsule will hard reset.
... but read the entire document to ensure you do it correctly. An Express that has been "hard reset" will create an open network with the name "Apple Network nnnnnn" where nnnnnn = the last few digits of its MAC address.
If you do not see the network with that name, the "hard reset" did not take effect, which will happen if you do not hold its little reset button long enough. In that case do it again.
Following the "hard reset", reconfigure your Express.
Failing that, position the Express closer to your wireless router. This may not be a practicable long term solution for you but it will minimize the possibility that wireless interference is causing the problem.
Consider substituting another router, to eliminate that as the cause.
Finally, you could take your Express to Apple who may simply offer you an exchanged unit. It will most likely operate perfectly well for them so you will not be able to demonstrate this failure mode, but you can explain you did all that I suggested above without success.

Issues with Maverick! MacBook Air 13"

Hello,
I have a MacBook Air 13" and just updated to the Mavericks from Mountain Lion - where everything worked perfectly. After upggrading my battery drains half as fast (went from almost 8 hours to about 4 hours now) and the fan is constantly working loud after a couple of hours from which the computer gets hot (which it almost never did before). I read of similar issues and have also tried about everything discussed in the forums like rebooting and the such but still no improvement and now my computer freezes more often. I am thinking of going back to Mountain Lion, but not sure of what to do. Help please!

You could lanuch the system monitor to find out the process which have the highest CPU usage. If there are some processes having pretty high CPU usage in spare time, I might be a bug in Mavericks. For instance, when I plugin my earphones, my 2013 Macbook Air will have a process named kernel_tasks will take the 100% CPU usage all the time. You could obtain more details in this post: https://discussions.apple.com/thread/5497235?tstart=0
I hope it will have some help for you. Thanks.

LED Cinema Display issues with audio and App Switching

The audio on my Cinema Display fails after about 20 minutes, unable to diagnose other than Mavericks.
When swithing between apps (seems like Safari more than anything else) I experience a 5 second freeze every 4th or 5th switch using external Apple Keyboard.
Alt-Tab or mouse click in dock makes the same the happen with Apple Keyboard
I do have an external Logitech Mouse but have treid all the other things in the other thread to fix that and it still happens with the mouse disconnected at start.
I don't have another external mouse to test.
Defeating the point of my external display, search through here isn't yielding much info...

I removed an older USB extensions cable and it reduced the frequency of it happening but it still happens.

Canvas display issue with stills and cross fades

When viewing a collection of JPEG stills with cross fades, the images appear like they are "settling in" the canvas window (almost as if they expand a bit and then 'retreat back' to the space the window has). When removing the transitions I don't have the issue. Issue also appears when do more complex builds. No difference whether stills are exact 720x480 or much bigger. I rendered a portion of my sequence out to QuickTime and via Compressor and it shows normal - so my only issue is that my preview before render is not reliable (for the stills portion). Also tried to swith off external video options etc. and changing size of canvas window with no result. Suggestions? (using FCP 5.0.4 and latest QuickTime)

I rendered a portion of my
sequence out to QuickTime and via Compressor and it
shows normal - so my only issue is that my preview
before render is not reliable
The preview of unrendered material is never reliable and isn't meant to be. It just gives you a basic idea what's there. Render the transitions and you should see them as they are meant to be seen.

Anyone have problems with a 2011 MacBook Air battery going dead

Has anyone had repeated issues with their 11" MacBook Air battery dying? I took mine in about 3-6 months ago and they replaced the battery. It was fried. It's happened again. Has anyone else had the same problems? Has anyone got apple to replace their Air with a newer model free of charge? Please reply back if anyone has had similar problems. Thank you.

How exactly are you using your Air?
A: are you ever or often letting your Air shut down from power loss?
B: do you have your Air always charging AND in sleep mode?
Your service on your battery has a warranty, contact Apple for another visit for full diagnostic and possible repair.
your logic board could have a fault causing the battery to dissipate abnormally.

After recent upgrade to Yosemite on Macbook air bluetooth audio cuts out and associated video stops with audio. Likewise with airplay and Apple TV. I have deleted all my saved wifi connections and restarted numerous times. I do not expect a resolutio

After recent upgrade to Yosemite on Macbook air bluetooth audio cuts out and associated video stops with audio. Likewise with airplay and Apple TV. I have deleted all my saved wifi connections and restarted numerous times. I do not expect a resolution from the community, but hope to get the attention of Apple engineers. If you are having same problems or have a miracle cure I am all ears.

May start my own thread, but I'm having similar issues.
I've been using an old iMac (running 10.7.5) and Apple TV for years with no issues. Last week I bought a new Macbook Pro running Yosemite and have had audio issues multiple times. The weird thing is that sometimes it works flawlessly, other times (like now) I spend half an hour just trying to get a song to play.
My issues are: When I got to "computers" in Apple TV to stream my music, my music is sometimes chopper or intermittent, and I seen to know when it's going to happen based on the status wheel just before it plays. When I choose a song, the status wheel will spin for an unusually long time, usually an indicator that the audio is either not going to work, or stutter.
When it does finally pull up a song, the playhead sits at the beginning of the song for a good 3-5 seconds before actually playing. Then, when it starts playing, it's all downhill. It will play a few seconds, drop out, play a few more seconds, drop out, and then ultimately the playhead will keep moving across the song as if it's playing, but there's no audio.
Again, this is a new phenomenon never experienced by me. I've tried everything I could think of, some of them all at once:
• restart Apple TV
• restart Macbook Pro
• quite iTunes/open
• turn off Home Sharing on iTunes then reconnect it
• unplugging and cycling both my modem and router
None of these have alleviated the problem.
The odd thing is, like this morning, the audio started up perfectly and never gave me any issues. It wasn't until later in the day that it started. Perhaps after the macbook pro had been put to sleep? Not sure.
Regardless, this is an annoying trait, one that's new to me and my system (as stated, worked flawlessly until my new purchase), and is 100% limited to either a) the macbook pro b) Yosemite or c) both of them.

I have recently update to the OS Maverik and I use a projector with a mini display port adaptor to my MacBook Air, ever since the only thing that projects is my desktop picture. I cannot get it to project my school work that I need to teach my students.

I have recently update to the OS Maverik and I use a projector with a mini display port adaptor to my MacBook Air, ever since the only thing that projects is my desktop picture. I cannot get it to project my school work that I need to teach my students. Help!

Hi Becki514,
Welcome to the Support Communities!
The following articles may help you with your projector issue:
Apple computers: Troubleshooting issues with video on internal or external displays
http://support.apple.com/kb/ht1573
Apple Mini DisplayPort adapters: Frequently asked questions (FAQ)
http://support.apple.com/kb/ht3382
Mac notebooks: How to use your computer in closed clamshell (display closed) mode with an external display
http://support.apple.com/kb/ht3131
I hope this information helps ....
Have a great day!
- Judy

I have a 2012 Macbook Pro and the GPU is causing issues with Yosemite. How can I resolve this issue?

I have a 2012 Macbook Pro and the GPU is causing issues with Yosemite. There are a number of issues I have run across:
If I have four tabs open on Safari then I start to get a flickering on the screen from the GPU refreshing
When I leave the computer alone for more than 20 mins the screen saver should start -- what happens is that the screen goes to black. When I move the cursor I do not get the login screen. I have to reboot
FireFox Web browser will not run
I get issues with the computer running very slowly
I have already turned off the transparency option in settings. Any ideas??
Cheers
Matt
MacBook Pro, OS X Yosemite (10.10), GPU / Video Card with Yosemite

Do you have more than one OS on the Mac?
You may want to look at something like http://bjango.com/mac/istatmenus/. This has a Free Trial window, but it is a commercial application. If there are any heat/sensor issues, this may help.
A SMC Reset or PRAM/NVRAM reset may also help.
Intel-based Macs: Resetting the System Management Controller (SMC) - Apple Support
Startup key combinations for Intel-based Macs - Apple Support

Just bought an iMac and use iCloud. calendar appointments on iMac are displayed 24 hours out of sync with the iPhone. the iPad and macbook air pick up the same information correctly. why is this?

just bought an iMac and use iCloud. calendar appointments on iMac are displayed 24 hours out of sync with the iPhone. the iPad and macbook air pick up the same information correctly. why is this?

Hi smokeondz,
Thanks for visiting Apple Support Communities.
If your iCloud calendar entries are not displaying as expected, start with the troubleshooting steps in this article:
iCloud: Troubleshooting iCloud Calendar
http://support.apple.com/kb/ts3999
Best Regards,
Jeremy

HDCP display issue with Yosemite and Macbook air

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