Your camera is being used by another aplication

hi, i just by my imac g5 and suddently photobooth wouldnt open anymore.
it says that my camera is being used by another aplication , but i have cheked if other aplications are open (ichat, imovie hd, comic life) ...and they are not. Please help me solve my problem..
How can i know witch aplication is using my camera?

It can be that you (or some one you share the Mac with) has not closed down an application that was using the camera when you switched accounts.
If you could check the other accounts have no applications running that use the camera. You can do this in sysprefs, accounts. (need admin access)
Very often Photobooth has an all account camera claim when running.

Similar Messages

Error "Your camera is in use by another application"-no other apps running

I just purchased a brand new iSight. I connected it to my G5 but when I start up iChat and click on the green video camera icon at the top right, I get a new window that just says "your camera is in use by another application". I don't have other applications running. When I click on the preferences button at the bottom of that window I get another new window with some options for microphone and bandwidth limit. The iSight is not even an option for microphone.
I tryed the iSight on a MacBook Pro and a iBook, it works perfect on both so I don't think there is anything wrong with the iSight.
A few months ago I tryed to run a mac compatible logitech camera on the G5 but couldn't get iChat to recognize that camera either. I wonder if did something that is coming back to haunt me.
I downloaded the latest updates for my iChat, tried all the basic stuff like removing the logitech software and restarting the computer...I am running out of ideas...Help, please. How do I figure out which app is "using" the iSight?

Hi Puppymac,
There are two things to try.
1) Try the Combo update
http://www.apple.com/support/downloads/macosx1046comboforppc.html
2) Try reinstalling Quicktime.
1:47 PM Wednesday; May 17, 2006

Isight camera- Camera is being used by another program

I use my MBP with an external keybpard, & mouse, and monitor so I run it witht he lid closed. Everytime I go to click on the ichat icon- I get a message saying camera is being use by another program.
I am also trying to use an external camera. THis message happens with out without the external camera being connected.
Any thoughts on this?

Try this... shut down ur machine, then hold the power
button for almost 10seconds or until u hear a beep,
then once ur machine is fully booted up the camera
should start working again. Good luck!
I don't have any issues, but I'm interested... What does this actually do? And what is it typically referred to as?
Is it similar to resetting the PRAM?

Error says"Your camera is in use by another application"...no apps running

I just purchased a brand new iSight. I connected it to my G5 but when I start up iChat and click on the green video camera icon at the top right, I get a new window that just says "your camera is in use by another application". I don't have other applications running. When I click on the preferences button at the bottom of that window I get another new window with some options for microphone and bandwidth limit. The iSight is not even an option for microphone.
I tryed the iSight on a MacBook Pro and a iBook, it works perfect on both so I don't think there is anything wrong with the iSight.
A few months ago I tryed to run a logitech camera on the G5 but couldn't get iChat to recognize that camera either. I wonder if did something that is coming back to haunt me.
I downloaded the latest iChat, tried all the basic stuff like removing the logitech software and restarting the computer...I am running out of ideas...Help, please
Powermac G5 Mac OS X (10.3.9)

HI Puppymac,
Does this help http://docs.info.apple.com/article.html?artnum=93216
Normally we would suggest running the appropriate Combo installer or try reinstalling Quicktime
Downloads here
11:43 PM Wednesday; May 17, 2006

IChat v4.05 Video not working - "Camera is being used by another applicatio

The camera is connected... works in photobooth and skype but will not work in iChat. I have no other applications open yet it says its being used.
I opened up terminal and did this command that i read on the forum and got this:
IT317m3:~ ddyke$ /Applications/iChat.app/Contents/MacOS/iChat -errorLogLevel 7
151853.459623 ER_AddFilter (0): Adding [Darren [email protected]]->[0]
151853.459676 setLocalUserName: Darren [email protected]
151853.462025 Creating a port mapping from 54469 to 16402...
151853.463633 Default video size is (640 x 480)
151853.464791 H264: (640 x 480) @ 20 fps
151853.466938 H264: (320 x 240) @ 30 fps
151853.467982 H264: (160 x 120) @ 30 fps
151853.469014 H263: (352 x 288) @ 30 fps
151853.470034 H263: (176 x 144) @ 30 fps
151853.470173 ######################################
151853.470187 # SoundDec_Create(81536 --> 393219) #
151853.470196 ######################################
151853.475062 Leaving SoundDec_Create
151853.475308 ### NEW STATE: to: VC_INIT, from: VC_INVALID
151853.475411 ### NEW STATE: to: VC_IDLE, from: VC_INIT
151853.475459 ++++++++ confStatusMapRemoveAll
151853.475520 ( ) -- mapUserIDToSecurityInfo cleared --
151853.475613 NATTraversal created
151853.475865 QT automatic setting = 16777216
151853.475938 Bandwidth based on QT prefs = 384
151853.521859 Selected microphone is the null device microphone.
151853.522025 vcCapabilitiesOfCPU returns: 0x00000fff
151853.522060 VCCapAudio
151853.522071 VCCapVideo
151853.522078 VCCapMultiAudio
151853.522085 VCCapMultiVideo
151853.522092 VCCapMultiAudioHost
151853.522151 VCCapMultiVideoHost
151853.522191 VCCapRDClient
151853.522203 VCCapRDServer
151853.522209 VCCapRecordAudio
151853.522216 VCCapRecordVideo
151853.522223 VCCapAuxVideoSend
151853.522230 VCCapAuxVideoRecv
151853.522476 BWD: GotBandwidth: 92651757/94003241 (up/down) @[166.7.39.10:0.255.255.255]
151853.522514 BWD bandwidth: 92651 kbits up, 94003 kbits down.
151853.522529 videoNetworkCapable: 1 -- 3 max participants.
151853.522566 audioNetworkCapable: 1 -- 9 max participants.
151853.522576 Supports PCMU wideband for audio: 1 / video: 1
151853.522643 vcCapabilitiesOfNetwork returns: 0x00000fff
151853.522655 VCCapAudio
151853.522693 VCCapVideo
151853.522702 VCCapMultiAudio
151853.522709 VCCapMultiVideo
151853.522716 VCCapMultiAudioHost
151853.522754 VCCapMultiVideoHost
151853.522767 VCCapRDClient
151853.522774 VCCapRDServer
151853.522814 VCCapRecordAudio
151853.522821 VCCapRecordVideo
151853.522827 VCCapAuxVideoSend
151853.522834 VCCapAuxVideoRecv
151853.522841 vcCapabilities returns: 0x00000fff
151853.522881 VCCapAudio
151853.522894 VCCapVideo
151853.522929 VCCapMultiAudio
151853.522940 VCCapMultiVideo
151853.522946 VCCapMultiAudioHost
151853.522953 VCCapMultiVideoHost
151853.522960 VCCapRDClient
151853.522966 VCCapRDServer
151853.522973 VCCapRecordAudio
151853.523011 VCCapRecordVideo
151853.523024 VCCapAuxVideoSend
151853.523060 VCCapAuxVideoRecv
151853.523635 Found 1 cameras:
151853.523735 Microsoft® LifeCam VX-7000 - 18446744073662365696
151853.528086 Microphone devices:
151853.528227 Line In
151853.528362 Microsoft® LifeCam VX-700
151853.528428 Selected microphone is the null device microphone.
151853.528513 vcCapabilitiesOfCPU returns: 0x00000fff
151853.528525 VCCapAudio
151853.528533 VCCapVideo
151853.528540 VCCapMultiAudio
151853.528547 VCCapMultiVideo
151853.528553 VCCapMultiAudioHost
151853.528560 VCCapMultiVideoHost
151853.528567 VCCapRDClient
151853.528574 VCCapRDServer
151853.528581 VCCapRecordAudio
151853.528588 VCCapRecordVideo
151853.528595 VCCapAuxVideoSend
151853.528602 VCCapAuxVideoRecv
151853.528751 BWD: GotBandwidth: 92651757/94003241 (up/down) @[166.7.39.10:0.255.255.255]
151853.528776 BWD bandwidth: 92651 kbits up, 94003 kbits down.
151853.528786 videoNetworkCapable: 1 -- 3 max participants.
151853.528793 audioNetworkCapable: 1 -- 9 max participants.
151853.528801 Supports PCMU wideband for audio: 1 / video: 1
151853.528828 vcCapabilitiesOfNetwork returns: 0x00000fff
151853.528838 VCCapAudio
151853.528845 VCCapVideo
151853.528851 VCCapMultiAudio
151853.528858 VCCapMultiVideo
151853.528865 VCCapMultiAudioHost
151853.528872 VCCapMultiVideoHost
151853.528878 VCCapRDClient
151853.528885 VCCapRDServer
151853.528892 VCCapRecordAudio
151853.528900 VCCapRecordVideo
151853.528907 VCCapAuxVideoSend
151853.528914 VCCapAuxVideoRecv
151853.528921 vcCapabilities returns: 0x00000fff
151853.528928 VCCapAudio
151853.528935 VCCapVideo
151853.528942 VCCapMultiAudio
151853.528949 VCCapMultiVideo
151853.528956 VCCapMultiAudioHost
151853.528963 VCCapMultiVideoHost
151853.528970 VCCapRDClient
151853.528977 VCCapRDServer
151853.528983 VCCapRecordAudio
151853.528991 VCCapRecordVideo
151853.528998 VCCapAuxVideoSend
151853.529005 VCCapAuxVideoRecv
151853.529174 Found 1 cameras:
151853.529200 Microsoft® LifeCam VX-7000 - 18446744073662365696
151853.529462 selectCameraByGUID: 18446744073662365696 returned 1
151853.533680 Microphone devices:
151853.533771 Line In
151853.533858 Microsoft® LifeCam VX-700
151853.533916 Selected mic: Microsoft® LifeCam VX-700
151853.608923 Selected microphone is Microsoft® LifeCam VX-7000.
151853.749143 SNATMAP Configuration: snatmap.mac.com:5678
151854.484457 Found 1 cameras:
151854.484515 Microsoft® LifeCam VX-7000 - 18446744073662365696
151854.484553 selectedCamera GUID returned Microsoft® LifeCam VX-7000
151854.488604 Microphone devices:
151854.488844 Line In
151854.489032 Microsoft® LifeCam VX-700
151854.489120 Selected mic: Microsoft® LifeCam VX-700
151854.501357 Selected microphone is Microsoft® LifeCam VX-7000.
151854.532566 Found 1 cameras:
151854.532633 Microsoft® LifeCam VX-7000 - 18446744073662365696
151854.532666 selectedCamera GUID returned Microsoft® LifeCam VX-7000
151854.536805 Microphone devices:
151854.536927 Line In
151854.537088 Microsoft® LifeCam VX-700
151854.537175 Selected mic: Microsoft® LifeCam VX-700
151854.549480 Selected microphone is Microsoft® LifeCam VX-7000.
151856.963348 in callback
151856.963371 -sdRef 0x15765400 ?
151856.963379 -flags = 00000000
151856.963388 -IFIndex 0 ?
151856.963395 -errorCode == 00000000
151856.963410 -publicAddr == 0.0.0.0
151856.963417 -proto == 16
151856.963424 -privPort == 16402
151856.963432 -publPort == 0
151856.963439 -ttl == 0
151908.750583 Comm reporting flags: 000000EC
151908.850644 CommNAT result:
External IP: 129.171.251.142
External Ports: 44957, 44958, 44959
CNAT_BADTEST ....... 0
CNAT_ISFULLCONE .... 0
CNAT_ISPAT ......... 1
CNAT_ISPATHOST ..... 1
CNAT_TRYPRESERVE ... 0
CNAT_PATINORDER .... 1
CNAT_BLOCKIP ....... 1
CNAT_BLOCKPORT ..... 1
CNAT_LOOPBACK ...... 0
151914.060800 vcCapabilitiesOfCPU returns: 0x00000fff
151914.060851 VCCapAudio
151914.060863 VCCapVideo
151914.060871 VCCapMultiAudio
151914.060878 VCCapMultiVideo
151914.060884 VCCapMultiAudioHost
151914.060891 VCCapMultiVideoHost
151914.060898 VCCapRDClient
151914.060905 VCCapRDServer
151914.060912 VCCapRecordAudio
151914.060918 VCCapRecordVideo
151914.060930 VCCapAuxVideoSend
151914.060937 VCCapAuxVideoRecv
151914.061105 BWD: GotBandwidth: 92651757/94003241 (up/down) @[166.7.39.10:0.255.255.255]
151914.061238 BWD bandwidth: 92651 kbits up, 94003 kbits down.
151914.061249 videoNetworkCapable: 1 -- 3 max participants.
151914.061256 audioNetworkCapable: 1 -- 9 max participants.
151914.061265 Supports PCMU wideband for audio: 1 / video: 1
151914.061295 vcCapabilitiesOfNetwork returns: 0x00000fff
151914.061307 VCCapAudio
151914.061315 VCCapVideo
151914.061321 VCCapMultiAudio
151914.061328 VCCapMultiVideo
151914.061335 VCCapMultiAudioHost
151914.061342 VCCapMultiVideoHost
151914.061349 VCCapRDClient
151914.061356 VCCapRDServer
151914.061362 VCCapRecordAudio
151914.061370 VCCapRecordVideo
151914.061377 VCCapAuxVideoSend
151914.061384 VCCapAuxVideoRecv
151914.061391 vcCapabilities returns: 0x00000fff
151914.061398 VCCapAudio
151914.061405 VCCapVideo
151914.061412 VCCapMultiAudio
151914.061419 VCCapMultiVideo
151914.061426 VCCapMultiAudioHost
151914.061433 VCCapMultiVideoHost
151914.061439 VCCapRDClient
151914.061446 VCCapRDServer
151914.061453 VCCapRecordAudio
151914.061460 VCCapRecordVideo
151914.061467 VCCapAuxVideoSend
151914.061473 VCCapAuxVideoRecv
151914.061485 Found 1 cameras:
151914.061515 Microsoft® LifeCam VX-7000 - 18446744073662365696
151914.177968 Conference_StartCamera for (Microsoft® LifeCam VX-7000) failed (80090010)
151914.290878 VCLocalVideoError
2008-09-19 15:19:14.290 iChat[873:10b] No iChat delegate set for vccLocalVideoError
151914.291525 startPreview returned -2
151914.291736 selectedCamera GUID returned Microsoft® LifeCam VX-7000
151915.244445 cancelPreview returned 0
conference_startcamera
154616.121039 vcCapabilitiesOfCPU returns: 0x00000fff
154616.121069 VCCapAudio
154616.121083 VCCapVideo
154616.121090 VCCapMultiAudio
154616.121098 VCCapMultiVideo
154616.121104 VCCapMultiAudioHost
154616.121111 VCCapMultiVideoHost
154616.121118 VCCapRDClient
154616.121125 VCCapRDServer
154616.121132 VCCapRecordAudio
154616.121139 VCCapRecordVideo
154616.121145 VCCapAuxVideoSend
154616.121152 VCCapAuxVideoRecv
154616.121318 BWD: GotBandwidth: 92651757/94003241 (up/down) @[166.7.39.10:0.255.255.255]
154616.121345 BWD bandwidth: 92651 kbits up, 94003 kbits down.
154616.121354 videoNetworkCapable: 1 -- 3 max participants.
154616.121362 audioNetworkCapable: 1 -- 9 max participants.
154616.121369 Supports PCMU wideband for audio: 1 / video: 1
154616.121397 vcCapabilitiesOfNetwork returns: 0x00000fff
154616.121407 VCCapAudio
154616.121413 VCCapVideo
154616.121420 VCCapMultiAudio
154616.121427 VCCapMultiVideo
154616.121433 VCCapMultiAudioHost
154616.121440 VCCapMultiVideoHost
154616.121447 VCCapRDClient
154616.121453 VCCapRDServer
154616.121460 VCCapRecordAudio
154616.121467 VCCapRecordVideo
154616.121476 VCCapAuxVideoSend
154616.121485 VCCapAuxVideoRecv
154616.121492 vcCapabilities returns: 0x00000fff
154616.121500 VCCapAudio
154616.121507 VCCapVideo
154616.121514 VCCapMultiAudio
154616.121521 VCCapMultiVideo
154616.121528 VCCapMultiAudioHost
154616.121535 VCCapMultiVideoHost
154616.121542 VCCapRDClient
154616.121549 VCCapRDServer
154616.121555 VCCapRecordAudio
154616.121562 VCCapRecordVideo
154616.121569 VCCapAuxVideoSend
154616.121576 VCCapAuxVideoRecv
154616.121587 Found 1 cameras:
154616.121612 Microsoft® LifeCam VX-7000 - 18446744073662365696
154616.233340 Conference_StartCamera for (Microsoft® LifeCam VX-7000) failed (80090010)
154616.345044 VCLocalVideoError
2008-09-19 15:46:16.345 iChat[873:10b] No iChat delegate set for vccLocalVideoError
154616.345574 startPreview returned -2
154616.345687 selectedCamera GUID returned Microsoft® LifeCam VX-7000
154618.231350 cancelPreview returned 0
Don't know what any of it means.. if somone can let me know what I have to do to make the iChat vid to work let me know. Thank you.

I have exactly the same problem! None of the above worked either. I have a logitech camera with iUSB installed which worked fine when I had 10.4.11, but after upgrading recently to 10.5.5 following a hard drive failure on my G5 imac and re-installing iUSBcam, all I get is that the camera is in use by another application! Again, as with the initial post, it works with photobooth and the logitech driver software fine.
I have seen on another post, that an "archive and install" from the original disk has solved the problem previously, but having just spent some considerable time re-building my system to where it was before the hard drive failed, I am a bit loathed to follow this route. Any ideas gratefully appreciated.

Ichat says camera is being used by another application when its not!

Evry time i go to hook up my cam, (sony handycam), the stupid computer tells me that my camera is being used already by another application...even when every app is closed and off.. it still says this

Hi,
This message can also show up when iChat is having trouble recognizing the video format coming from the camera. I'm not sure if it will help, but you may want to try installing the iChatUSBCam demo to see if it help iChat to recognize the camera.
Glen

This is the message that I'm being given on tinychat. your webcam is being used by another application. any solutions?

this is the message that I'm being given on tinychat. "your webcam is in use by another application" Any suggestions?

One other thread said it was fixed by waiting till prompted by iTunes to insert the blank disk, instead of putting it in first. Does that work? Found a number of hits on this Googling.

Webcam being used by another aplication?!?

My old webcam some time last year stopped working one day and complained that another program was using it, i exited as many processes as i could to see if it would work, it did not. i tried reinstalling, i tried going in safe mode, i tried updating, i tried different usb ports, i tried unistalling 00s of programs, I GAVE UP! I just got another webcam today, (Creative Li've Cam Video IM Pro) and hoped that it would work, same problem, another program is using it, both of the webcams work on my other pc, any ideas how to fix this problem!?!?

My old webcam some time last year stopped working one day and complained that another program was using it, i exited as many processes as i could to see if it would work, it did not. i tried reinstalling, i tried going in safe mode, i tried updating, i tried different usb ports, i tried unistalling 00s of programs, I GAVE UP! I just got another webcam today, (Creative Li've Cam Video IM Pro) and hoped that it would work, same problem, another program is using it, both of the webcams work on my other pc, any ideas how to fix this problem!?!?

Camera being used by another app?

Hey out there,
I've got a powerpc G5 w/built in isight & I'm getting the "your camera is being used by another application" error. I've seen other posts regarding this, but they all seem to be with older macs & external cameras. Any ideas, reload QT?
Thanks
iMac G5 2.1 Ghz isight refurb 1.5 gb ram iMac G4 800 mhz Mac OS X (10.4.4)

Hi,
If you mean here
http://www.mvldesign.com/videoconferencetutorial.html
That is not my page.
Mine is here http://www.ralphjohnsuk.dsl.pipex.com/ and does not have any Pic request stuff.
9:19 PM Thursday; January 4, 2007
To All but no-one in particular.
Please mark your question as Solved or Answered
Mark any posts that have aided you with the tag.
And the post that provided your answer with the tag.

Camera being used by another application!?

I just bought my Mac Book Pro and tried to open Photobooth. It says that the camera is being used by another application and wont open. Can anyone help?! I ran the hardware test that comes with the setup CD and it didn't find anything wrong..
Mac Book Pro
Mac Book Pro

Hi
Have you tried shutting down you Mac and waiting a couple of mins and then start your Mac again.
Tony

My iPod isn't being used by another program!

So I just got a new, 2nd gen green iPod shuffle today. And I updated it once and I got all my Kelly Clarkson songs on it. Then I synced some MCR songs on iTunes and I plugged my iPod back into the computer via USB dock. It kept on saying 'iPod is being used by another program, not able to update.' I tried this several times and the same message kept on popping up. I got really frustrated.
Would someone be kind enough to help me?
iPod 2nd Gen Shuffle Windows XP

Just try restarting your computer first. Your computer has many, many applications running at any one time so its not surprising that your iPod is being used by another programme. If you uploaded your Kelly Clarkson songs then closed iTunes and then opened iTunes up again, without turning your computer off, or even worse - just pulling your iPod out of the USB port without pressing the disconnect button!, then the computer may still think iTunes is using it and iTunes itself may think another programme is using your iPod when actually, iTunes is using it itself! So I suspect that once you have turned your computer off and turned it on again, then when you plug your iPod in again it will work.

Says camera is in use by another program

Eventhough nothign else is open.
I recently upgraded to 10.4.8 in order to fix the sudden shut-down bug on macbooks. Now, iPhoto starts up when I start up. COuld these be related ot the iChat problem?

Hello gdoeas
Now, iPhoto starts up when I start up.
You can stop this by removing iPhoto from your System Preference > Accounts > Login Items. Then just launch iPhoto yourself whenever you wan to use it.
You should also check your Image Capture application's Preferences > General > Camera: Choices Bar to be sure that it is set to "No application" to prevent unintended application launches.
COuld these be related ot the iChat problem?
I do not see how unless you got a bad 10.4.8 download or install.
Disconnect any USB add-ons while you are trying to troubleshoot. Item 2 of Apple's USB Device Troubleshooting article tells you to unplug all USB accessories from the computer while troubleshooting.
Then try all of Apple's relevant suggestions from iSight "Your camera is in use by another application" message.
If your problem persists, try the suggestions re: Built-in iSight in How to Troubleshoot iSight.
If none of the above corrects your problem, you may have had a bad download or install of 10.4.8, Try the following to rule out this possibility:- Repair permissions.
- Then download and apply this Mac OS X 10.4.8 Combo Update (iNtel).
- Finish with another Permissions Repair, and then check your iChat again.Users have reported fixes to a variety of audio, video, connectivity, and software conflicts and unreliability issues after properly applying Combo Updates.
Please let us know if any of these suggestions helps you.
Cheers,
Jim
Mac OS X (10.4.8) G5 DP 1.8 External iSight

When I tried to access iphoto today I got a "being used by another application or your library has become unreadable" anyone know what I can do about this?

when I tried to access iphoto today, I got a "being used by another application or library has become unreadable" anyone know how I can fix this?

What version of iPhoto and of the OS
Back up your iPhoto library, Depress and hold the option (alt) and command keys and launch iPhoto - rebuild your iPhoto library database
LN

Your iCloud account is being used with another device (200+ iPads)

Hello!
I work at a school and currently manage 200+ iPads, we use 1 iCloud account to keep a track of them, I have all backup services switched off and they purely use it for the 'find my iPad/phone' section on iCloud.
However, since iOS 8, a lot of these iPads display the message 'Your device is currently also being used on device studentiPad001' then when a student presses ok, it will pop up again with another iPad name it is being used on, it won't list all iPads that it is currently on but it will repeat this for at least 3-5 minutes.
I thought this would only happen the once after the update but it just picks random times to do it and random iPads, I will soon have to remove the iCloud account from the iPads as it is becoming a massive inconvenience.
Are there any other ways I can physically track the iPads or get rid of this notification?
Thanks!

Most likely, you're getting a network address from your router. The address assignment ("lease") expires, and has to be renewed, after a certain amount of time, which might be one hour or one day. The lease expired without being renewed because the device was offline at the time. Meanwhile, the address was leased to another device on the network. When the first device comes back online, it still has the address that's now also leased to the second device. Depending on what kind of router you have, the conflict may resolve itself automatically. If not, then from the menu bar, select
 ▹ System Preferences ▹ Network
If the preference pane is locked, click the lock icon in the lower left corner and enter your password to unlock it. Then click the Advanced button and select the TCP/IP tab. Now look at the menu labeled Configure IPv4. If the selection in that menu is Using DHCP, click the button labeled Renew DHCP Lease. Test.
Less likely, you have a network address that you assigned yourself, and another device is assigning itself the same address. In that case, the selection in the Configure IPv4 menu will be either Manually or Using DHCP with manual address. This kind of conflict won't be resolved automatically. You have the following options to resolve it:
Change the menu selection to Using DHCP.
Change the manually-assigned address to one that isn't being used by another device.
Change the address of the other device.
Which of these options you should choose depends on the details of why you're using a static IP address. Any change you make to the network settings must be applied before it takes effect. To do that, click OK and then Apply.

What exactly does "your IP address is being used by another device"

everything is in the question, I recently had to deal with hacking attempts by e-mail, that's why I pay attention
thank you

Most likely, you're getting a network address from your router. The address assignment ("lease") expires, and has to be renewed, after a certain amount of time, which might be one hour or one day. The lease expired without being renewed because the device was offline at the time. Meanwhile, the address was leased to another device on the network. When the first device comes back online, it still has the address that's now also leased to the second device. Depending on what kind of router you have, the conflict may resolve itself automatically. If not, then from the menu bar, select
 ▹ System Preferences ▹ Network
If the preference pane is locked, click the lock icon in the lower left corner and enter your password to unlock it. Then click the Advanced button and select the TCP/IP tab. Now look at the menu labeled Configure IPv4. If the selection in that menu is Using DHCP, click the button labeled Renew DHCP Lease. Test.
Less likely, you have a network address that you assigned yourself, and another device is assigning itself the same address. In that case, the selection in the Configure IPv4 menu will be either Manually or Using DHCP with manual address. This kind of conflict won't be resolved automatically. You have the following options to resolve it:
Change the menu selection to Using DHCP.
Change the manually-assigned address to one that isn't being used by another device.
Change the address of the other device.
Which of these options you should choose depends on the details of why you're using a static IP address. Any change you make to the network settings must be applied before it takes effect. To do that, click OK and then Apply.

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