Hardware :: System Does Not Detect The Monitor In Display Preferences

Aug 23, 2009

a mini display port. I purchased the mini display port to DVI adapter to hook my computer up to a Viewsonic vx2235wm 22" screen. I plug it in and get nothing. I've read on the apple support site that some people with older mac mini's and MacBook Pro's can hook it up no problem. But for me, my monitor is getting no signal and my MacBook Pro doesn't detect the monitor in the Display Preferences.

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MacBook Air :: Doesn't Detect External Monitor Connected Through Mini Display Port To HDMI Adapter

Sep 8, 2014

I bought a MBA 13" last month and now I'm trying to connect an external monitor through a Mini Display Port-to-HDMI adapter and most of the times the display shows a message "No signal detected"...

I've tried all the possible combinations between the MAC and the Monitor but it would seem a random matter.

Info:
MacBook Air (13-inch Mid 2012), Mavericks 10.9.4

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Mac Mini :: Dell Monitor - Energy Preferences Set To Turn Display Off After 15 Minutes

Jun 28, 2009

I have my 09 mini connected to a Dell E177FP and I have the energy preferences set to turn the display off after 15 minutes. The problem is that the display never turns off. It just sits at the "check signal" screen as if it was not plugged into anything. How can I get the monitor to go into standby mode?

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OS X :: Cannot Access Display In System Preferences

Feb 5, 2010

When I try to select display in system pref. the display window will open and then close without letting me make any changes.

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OS X V10.7 Lion :: How To Restore Resolution Choices In Display In System Preferences

May 11, 2012

Today I did my normal software update as usual only to find out the Lion update left me with only two choices of screen resolution, 1920x1200(too big) and 960x600(too small), on my 24" iMac. The same update did not affect my Pro. As I need a 1024x768 screen resolution on my iMac, how can I restore those screen resolution settings? I called AppleCare, and they sent me an additional update that I downloaded and installed but it did not change anything. My iMac is right at 5 years old. Do these things ever get to the point that updates create such problems? Everything was working perfectly until this happened. Plus they said there's no way to go back(that is, return to the same point that I was before the update).

Info:
iMac, Mac OS X (10.7.2)

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MacBook Pro :: Won't Detect Monitor - Screen Goes Blue For A Second?

Oct 9, 2009

I have a 13" MBP and it won't detect my external display. It works fine on my sister's whitebook using, but won't detect at all on the MBP. I've went to "detect displays" under system preferences, played around with the cable, and made sure the monitor is on. It work's flawlessly on my sisters. What's wrong? Any suggestion on what I should do? I'm losing my mind right now. The screen on the MBP goes blue for a sec when the external display is connected, but then just goes back to it's original desktop.

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MacBook Pro :: How To Detect External Monitor Via HDMI

Jun 29, 2014

This is my first Mac. I cannot get it to detect my external display:  It is an ASUS PA248Q, manufactured Aug 2012.

The HDMI cable according to my Amazon history is at least 1.3c from 2010,  "Fanatic Digital Imperial Series Gold-Plated HDMI Cable (6 feet)". It works with perfectly connecting an AmazonTV box to an old Samsung TV, with vivid clarity, unlike our cableTV signal.

Just in case, I have a new HDMI cable on order, which claims to be of newest standards. The Macbook Pro Retina (late 2013) has the standard Intel Iris from the Haswell chips, as well as Nvidia GT 750M, the latter which I don't think has been used yet.

The ASUS display says:  HDMI NO SIGNAL. 

I have tried shutting them down and replugging the cable.  I don't know what the ideal order is.  The Macbook Pro is plugged into AC power, as suggested.

In System Preferences>Display, I press the Option key to select "Detect Displays" option (seriously unintuitive). 

I have also tried resetting the NVRAM:

I shut the machine down.  Pressed the power button, then quickly held the quadruplet:  Option-Command-P-R  (a double handful) and waited for the machine to chime a 2nd time.  Tried to detect external display no luck. 

Next, I reset the SMC:

I shut the machine down.  Then I pressed Shift-Control-Option-Power   for about 5 to 10s.  Then I turned on the machine normally. NVRAM & SMC steps were from an old youtube video, as the instructions I had did not explain how to do so clearly.

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MacBook Pro :: When Open The Accounts Preferences, System Preferences Quits Unexpectedly?

Apr 21, 2012

I've a MBP running 10.6.8. When I open the Accounts preferences, System preferences quits unexpectedly.

Info:
MacBook Pro, Mac OS X (10.6.8)

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Intel Mac :: It Will Not Detect External Monitor After Recent Update

Apr 10, 2012

I have a VGA monitor plugged in to my imac using the VGA adapter to the mini-DVI.  All was working well. Since I updated over the weekend, the computer will not detect the monitor. 

Info:
iMac, Mac OS X (10.6.8), VGA Adapter

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MacBook Pro :: Mini Displayport Can't Detect External Monitor

May 28, 2012

I own a MBP 13 that I wish to connect with my Acer external mobitor. I bought a miniDisplayport to HDMI [male] cable for this purpose. Now the problem I am facing is that even though my 40" Samsung TV detects the MBP and works as an extended monitor, the MBP fails to detect the Acer monitor. However, I currently use the Acer monitor with my Mac Mini, Tata Sky+ set top box and also my Playstation 3

Info:MacBookPro, Mac OS X (10.7.4)

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OS X :: Hotkey To Detect Display?

May 6, 2006

a hotkey to detect new displays? I plug my Powerbook into my TV often and don't want the little Detect Display icon in my menu bar. It would be much easier just to use a hotkey, or even if I could set up a shortcut to do it.

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OS X :: SL Does Not Detect Display On Launch

Aug 29, 2009

I use two monitors: an Apple Cinema display and a Dell, which is display number 2. I installed SL and it was normal until I rebooted the first time. Now every time I boot up, the only display that is found is the Dell and I have to go into preferences and select "detect displays" to make the main one show up. It loads as if the Dell is the only display, and since it is smaller it messes up my desktop, lumping all my icons on top of each other. When I click "detect displays," it moves everything back to the Apple monitor, making it the main display as it should be, but it is all out of whack.

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MacBook Pro :: It Won't Detect VGA Display

Mar 13, 2012

My MacBook Pro (15-inch i7 Early 2011) won't detect an external display using an apple mini displayport -> VGA connector using 10.7.3.All cables and the monitor are fine because my white macbook detects the LG monitor without any problem.I have read and tried every 'sollution' suggested on the internet, but all fail. Since my MBPro can't even detect my Sony LCD TV (my white macbook does) i suspect it's a firmware/hardware issue.I want to buy a thunderbolt display, but am not sure if i can spend all this money when even this simple VGA connection won't work.  

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Applications :: Where Are The Preferences In System Preferences Located

May 12, 2010

I'm not talking about the System Preferences app itself, I'm talking about the settings within the app. So for instance, the security settings, and the mouse settings, energy saver, etc.

Where can I find the settings files on my Mac so I can back them up?

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MacBook Pro :: Cannot Detect External Display

Apr 24, 2012

I have a 2011 MBP (thunderbolt) that I've had for about a year now. I use it daily at work, with an external LCD monitor connected with a mini-dvi -> DVI, no problem, except for the occasional need to restart when first connected.

However, at home I have an AOC Razor 24" monitor that until recently was connected to my home PC via HDMI, working just fine. However, my PC died and now I would very much like to be able to use this monitor at home until such a time when I get around to finding a desktop replacement. My MacBook Pro, however, has completely different ideas it seems... It completely refuses to recognise the monitor. I don't get the blue "flash" and it doesn't show up int eh display panel at all, not "sleeping" or otherwise, it simply looks as if it's not there.

Having trawled the forums, I've done the Jan/Feb firmware update, I've tried two different HDMI converters (One the Moshi from my local Apple retailer, the other a no-name brand converter, which works fine elsewhere), I've even tried a mini-dvi -> DVI -> HDMI converter (I know, I didn't expect it to work, but when you're at then end of your wits, you're at the end of your wits ). I've gone through three HDMI cables and tried an assortment of "black magic" solutions found on the net, with the adapter half-way plugged in, resetting the PROM, closing/opening the lid, running gfxCardStatus ( just in case it did something ) and checking the monitor elsewhere.

The only thing I haven't done (that I can think of) is swap the actual MBP,however, as mentioned, I use an external DVI monitor every day, so it doesn't seem likely that that's where the problem is... I'm guessing it's got to do with how the monitor handles HDMI or some such thing but I don't seem to be able to find much of a comment from anyone else on the net, so here I am... I considered sacrificing a goat at full moon, but I'm not entirely convinced that'll do much either and I upgraded to Lion as I saw a throwaway comment somewhere from someone, indicating that that might or might not have helped them with a slightly similar problem... So this problem now spans 10.6 AND 10.7... 

Info:
MacBook Pro, Mac OS X (10.7.3)

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MacBook :: Unable To Use Auto-Detect Display

Dec 15, 2009

I have a macbook with leopard osx and use it frequently for presentations and so on. I have connected it to several monitors and projectors a hundred times and it has worked fine since last night.

Last night, I have connected my mac to a monitor with vga cable but it did not detect it and instead a constantly flickering blue screen came up and never went. I am sure the cables are fine.

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Intel Mac :: Unable To Detect An External Display?

Feb 4, 2012

I'm using a mini display-port to hdmi lead and it worked once. I unplugged the hdmi cable when it was still connected to the mac and now it wont find it.

Info:
iMac (27-inch Mid 2011), Mac OS X (10.7.3)

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MacBook Pro :: Won't Detect New Thunderbolt Display 27 Inch

Aug 25, 2014

I have a Macbook Pro mid 2009 running Mavericks. I have an old 23" Cinema Display that uses a big chunky adaptor (ADC?) with a dual USB and Thunderbolt cable and it works well with it, however, I just bought a new Thunderbolt 27" display and it just won't detect it. I also notice that a lacie drive in the same Thunderbolt slot won't show up either. The old Cinema Display does still work however using that same slot so it's not actually dead. Puzzled!  

I know this MBP is probably one of the first generation to have Thunderbolt but I've never used it for anything other than the old Cinema Display adaptor. 

Info:
MacBook Pro, OS X Mavericks (10.9.4)

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MacBook Pro :: System Does Not Detect The Drive?

Feb 29, 2012

I passworded my external hard drive using disk utility. the system does not detect the drive after i did a clean install. what do i do?

Info:
MacBook Pro, Mac OS X (10.7.3)

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Mac Pro :: Graphics Card Not Working / Unable To Detect Display

Oct 13, 2009

I just got a new mac pro dual quad core to replace my single dual core for work. Im trying to pull my Nividi Quadro 4500 out of my old machine that i had installed by apple in to my new machine. i get it all hoked in right but when i turn on my new machine it dosnt detect the display. Any suggestions?

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Intel Mac :: Can A Mac Detect A MINI Display Input From A Cable Box

Mar 22, 2012

watch Tv on my New Imac 21.5 (2012) with thunderbolt port.My set top box has HDMi out. I need to connect HDMI ( from Cable Box) to thunderbolt ( On Imac)I have learned that this can be done by single coverter cable = HDMI to Mini display cable (Thunderbolt port will accept Mini diplay Input, they say)  will it work > how about the audio? 

Info:
iMac, Mac OS X (10.6.7)

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Hardware :: Unable To Detect External Display - Sanyo HDTV?

Dec 20, 2008

New MacBook rocks and in cables to hook it up to my Sanyo HDTV 1080p. I plug in the HDMI cable and the picture comes on.

However, every once in awhile the screen goes black and it says "Signal Not Found." Also, every time I turn on the MacBook I have to unplug the HDMI cable, wait a few seconds, and then plug it back in before it will detect the external display.

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IMac :: No Option To Detect External Display / Screen Resolution

Aug 6, 2010

I have a 27" imac and have been using an apple led cinema display with it. I have had no problems with the display until today. Yesterday I installed windows 7 via bootcamp and had some trouble with the second display being detected but after downloading all of the bootcamp updates it worked fine. Today I restart my computer back into OSX and the display does not work. I tried resetting the PRam or whatever but that didnt do anything. When I go to system preferences > display there is no longer an option to detect display and there are no longer options to change the screen resolution.

I spoke with an apple tech who has me installing an update but I dont think she really knew what was going on and I doubt this will work. When I reboot back into the windows partition the display works during start up and I see the windows logo. So I dont think its a hardware issue (also the display still works fine with my macbook pro). But as soon as startup finishes I get a black screen. Under the control panel windows still recognizes that there is a 2nd display attached and you can still drag items over to the other screen, I just cant see anything. All black.

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MacBook :: Can't Make Monitor On Mini Display Port Primary Monitor?

Aug 18, 2010

I have a fresh install of Windows XP, service pack 2 on a boot camp partition on my macbook (13" first gen aluminum case) and a Apple LED Cinema Display attached to the mini display port.

I can't seem to make the Cinema Display the primary display (the "Use this device as the primary monitor" checkbox is always greyed out in the Display Property Settings tab). I also can't shut the macbook lid and continue to use it closed (with kb, mouse and monitor attached) like I would when booting OSX.

Is there some other way to make the Cinema Display the primary monitor, so I can leave the macbook closed when booting into Windows?

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Mac Pro :: Installed 2 Super-drives - Unable To Detect By The System?

Jun 30, 2012

I installed 2 ne w Optical drives in a 2008 3,1 MacPro Quadcore.After installation and booting up, the system profiler failed to show ANY optical drives and I was unabel to open/eject the drives naturally. I then unplugged the bottom one and rebooted and the top drive (still plugged in ) worked. I then shut down and unplugged the top drive and plugged in the bottom drive - rebooted and now the BOTTOM drive is recognized. When BOTH drives are plugged in , the system fails to show either of them.So when individually plugged in it's fine but when bith are plugged in neither of the drives are detected or operate. 

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OS X :: Unable To Make Any Changes On System Preferences / Put Parental Control On System

Mar 29, 2010

could not be sure whether the Admin user - password reset with the CD would be the solution to my question as suggested in previous threads I searched - and have no idea where my start up install CD is

So my question-

I was trying to put parental control to ask for password when my computer starts up. I did something I guess and messed up the info.

I can log in with my own account when I restart my apple - which says now it is a standard account (must have messed that up)- but can not make any changes on system preferences or anything else that requires login and password. It requires Admin info. My own login that I use now used to be my admin so do not have any other info set.

now on system pref - accounts - an account titled "test" seems to be admin but can not even access that and reverse myself to be the admin since I can not unlock system pref. Or cant click on "Login Options" for the same reason.

There are no other users on this computer than me.

What do I need to do to make myself admin again?

Hope this was somewhat a clear question

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OS X V10.7 Lion :: Sharing System Preferences Freezes Entire System

Jul 3, 2012

I recently took the plunge and installed Lion after being content with Snow Leopard....well now I have quite a few issues. When I open system preferences for some reason it automatically opens to Network...why I'm not sure. When I click show all, then click sharing, I can't make any changes in the Sharing preferences without my entire system locking up. I can't force quit or anything. I can still use the mouse but all I have is the rainbow wheel!

I have searched and searched and haven't been able to fix it. I have tried booting into the Guest account and the same problem happens there. I have trashed all the plist files everyone says to try. I have tried repairing permissions etc. I feel like I have tried everything. Is there anything else that I can do without have to do a clean re-install. I'm hearing if I do this that I won't be able to migrate my files from by backups due to permission problems?

I also took a look at my system log and it is full of this!
Jul 3 22:24:26 jessica-imac com.apple.launchd[1] (com.apple.Kerberos.digest-service[1307]): Exited with code: 1
Jul 3 22:24:26 jessica-imac com.apple.launchd[1] (com.apple.Kerberos.digest-service): Throttling respawn: Will start in 10 seconds .....

Info:
Mac OS X (10.7.4)

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MacBook Pro :: Using System As A Wireless Router / Unable To Detect Network

Dec 31, 2010

I just purchased my new macbook pro and I wanted to know if it was possible to use the laptop as a router so that my PS3 could connect through it. I followed the steps someone else mentioned:

(1) Open System Preferences on your MacBook Pro, and open "Sharing"

(2) On the left column, click Internet Sharing and check the box

(3) Use the drop-down menu to select Ethernet in "Share your connection from..."

(4) Check the box next to Airport in the section "To computers using..."

(5) Close System Preferences and open the Airport menu from your Toolbar (top)

(6) Click "Create Network", add a name to your Computer-to-Computer network

(7) Leave the Channel as Automatic, add a password if you require (make sure your PS3 is compatible with your chosen level of security), click Ok.

(8) Connect an ethernet cable between your broadband modem and MacBook Pro

(9) Turn on your PS3 and perform your usual setup when connecting to a wireless network

I have an Ipod, and it did detect the new connection that was setup; however, my PS3 and my Windows Mobile phone did not detect it. Is there a reason for this? Do only Apple devices identify this connection?

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MacBook Pro :: Detects An External Monitor But No Display On The Monitor?

Aug 5, 2009

As said, my current set up is an HDMI - DVI cable (HDMI to monitor and DVI to adapter) and my DVI - mini DisplayPort adapter, everything is connected fine but when I turn on the monitor, it says cable not found... and nothing is displayed on the screen but on the Macbook side of things, it sees the monitor is connected (I can extend the screen and leave the screen) but other than that, it appears I cannot get an image on the monitor, pressing every button on the monitor does not work either.

Any other information that may seem necessary, let me know. I tried clearing my PRAM and clearing the power and such but nothing seems to work.

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Intel Mac :: Connect 17" Macbook Pro As External Monitor To 24" But Won't Detect Displays

Apr 7, 2012

I'm using a mini display port to dvi adapter and dvi cable. 17" macbook pro is several years old and software is up to date.

the first picture is from the imac, the second is from the laptop.

Info:
iMac, Mac OS X (10.6.7)

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