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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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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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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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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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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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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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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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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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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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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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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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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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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Aug 21, 2010
The first problem was that it was stuck on the boot screen, about to try reinstalling and now found out it cant detect my HDD :/
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Jan 3, 2011
I would like to know if my activity over the internet is being monitored. I have some networking experience but I know very little about how VNC operates other than the software does not have to be on a Mac to monitor my activity and I only need to be on the same network. Are there native utilities on my computer (late 2008 MacBook 10.6) that can detect network monitoring? Should I being researching other technologies, other than VNC?
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Aug 21, 2010
I just got an iomega home media network hdd (1tb) and i wanted to back up my macbook pro tht runs on OS X (10.6)
i installed their retrospect (6.1) software and conected the drive with the lan cable provieded by iomega and i did evrything they told me, but the drive doesnt not mount.
my computer doesnot detect the dive and a red light flashes on the drive in between the blue light (which is the only light tht should flash)
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Aug 26, 2010
I was copying files to my external hard drive (firewire) and finder froze and relaunched. I got the generic error saying that my "device was ejected improperly". Now when I try plugging in my hard drive my Macbook Pro (2008) it won't recognize it. I've tried:
1. Using USB instead of Firewire
2. Checking Disk Utility
3. Checking System Profiler
4. Resetting PRAM
5. Resetting SMC
6. Using Data Rescue 3
Nothing seems to detect my hard drive.
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Dec 15, 2010
I've but a bit of thought (and research) into this with no avail.
Basically, I'm trying to detect when a screenshot is taken.
The people over at CloudApp say they do it by monitoring the users screenshot path (com.apple.screenshotpath or whatever) and looking for new files that start with "Screen shot". However, this isn't reliable.
The people over at grab.by wouldn't reveal their secret method, but, a search of their help database reveals "Additionally TinyGrab for Mac will not auto-upload images if 'Spotlight' indexing in OS X is disabled."
P.S. I'm a total noob at this. Try to take some time dumbing things down
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May 19, 2008
I am connecting my Macbook on my HD TV but the osx does not detect the appropriate native resolution. MY Samsung TV has a native resolution of 1365x768 but the osx only detects and offers 1280 or 1920 (they both look really bad on my TV). I used a mini-DVI to DVI adapter and a DVI to HDMI cable. I also tried, without success, to create specific display settings using SwitchResX and DisplayConfigX. (10.5.2) I know that there is not a big difference between 1280 and 1365 but still, it's very annoying espacially that I my old PC with XP detected the right resolution as soon as connected it...
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May 30, 2009
I was surfing the web, and suddenly the wheel started spinning and my MacBook locked up. I tried rebooting, only to see a folder with a question mark on it. So I tried to boot from the DVD and use Disk Utility to repair my HDD. But Disk Utility didn�t detect my hdd. So I assumed that the drive was dead and bought another one and istalled it.
The new hdd was not recongized by my machine either. Then I took the old hdd and installed it in a external case which connects to the computer with USB and I managed to boot OS X from it.
Anyone knows how I can make my MacBook detect my internal SATA drive?
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Apr 8, 2012
I have an external Vivitar V69379UA, which can be used as a Webcam. I was wanting to use it with photobooth and facetime, but I have a problem. Quicktime 10 does not detect my external camera, even after I installed the driver, which created a .component and .ini in the /Library/QuickTime folder. However, when I install Quicktime 7 on Snow Leopard, I can see the camera inside of the Quicktime 7 record video option. The problem is, PhotoBooth and FaceTime only listen to Quicktime 10, which does not detect my camera.
Info:
QuickTime, Mac OS X (10.6.8)
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Apr 28, 2012
My MacBook Pro won't detect my SanDisk USB, I recently had the same problem with a card reader. Initially, I thought it might just be the card reader but now I'm thinking it is an issue with my MacBook.
Info:MacBookPro
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Jun 5, 2012
my iMac (Intel, OS X 10.6.8) doesn't detect dvd's anymore. I can hear the disc spinning but after a while it will be rejected. It's the same with original dvd's and copies.
Info:
iMac (21.5-inch Late 2009), Mac OS X (10.6.8)
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Sep 9, 2014
my macbook pro can't seem to detect ANY usb drive. I have already selected to "show external disk/drive" on finder's preferences but it doesn't work.
Info:
MacBook Pro with Retina display
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Jan 3, 2011
I have a macbook pro (penryn) that just stopped working. I believe the hard drive just died on me because whenever I try to boot up, I just hear this clicking sound. I think I may have a bootable backup I made with SuperDuper! a while back on my external hard drive. I tried connecting it to my MBP but it wouldn't detect the drive. I only get the mouse cursor when I hold down the option key at boot.
Does anyone know if this may be a known defect? Do you think Apple will replace the hard drive for me?
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Jan 12, 2011
Never had a problem until this mourning. My Mac Mini could not get online. I have a netgear router and it see's it but can not connect to it. Funny thing is my iPad and iPhone cant connect to the wifi anymore either but my wifes Dell laptop can.
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Dec 17, 2006
I used to have an old iBook G4 whose hard drive conked out on me a few months ago. I sent it to Apple and go a new hard drive installed. This model of the iBook does not have the wireless built in but I got a free Airport card during the purchase and its put in. Now, I've installed Panther on it but a problem I've noticed is that I simply can't detect any wireless networks. I can turn on and off the wireless in my menu bar but whenever I search for networks, it detects nothing. This is all the time of course, next to my iMac and Powerbook which have no problems detecting the network. I've tried re-installing the OS even.
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May 14, 2008
I recently bought two 2GB sticks of OWC 800 MHz ram for my Mac Pro.
My Mac Pro originally had two 1GB sticks, which worked fine, I just wanted more.
It seems that they don't work together. I've tried every possibly configuration. Is it the case that they just aren't going to work together because they are different sizes?
Right now, I have the two 2GB sticks in A1 and A2. And the stock 1GB sticks in B1 and B2. A1 and A2 gets detected, but B1 and B2 doesn't.
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Oct 1, 2008
I just got the apple mac pro raid card today, but after I connect it and all 4 SAS drives, the MAC OSX Installtion program can not detect the SAS at all, I open the RAID Utility but no dirve there, the battery is in charging status.
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Dec 14, 2008
I am having a strange problem with my computer none of the USB ports detect anything when i plug something in when its turned on but if it was plugged in before the computer was turned on it detects them fine.
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