Macbook Pro stops being able to detect wifi network

This is bugging me - over the course of the last 24 hours my relatively new (ie < 6 months old) Macbook Pro has started to drop its wireless signal. I can be sitting with both the new Macbook Pro and an old Macbook (circa 2006) both connected to my network via Time Capsule with both of them working fine, only for the Macbook Pro to suddenly seize up and lose the wireless signal. Hours later it works again, as if by magic! The strange thing is the Menu bar shows that I am connected to my network, but Airport Utility cannot see either the Time Capsule or the Airport Express on my network
Are there are diagnostic tools or terminal commands/logs I can use to try an pinpoint what or where the problem is? Any advice gratefully received
I intend on taking this Macbook in for servicing but I'd like some evidence first otherwise I'll look like a bigger bozo

Open System Preferences / Network / Wi-Fi / Advanced... and delete the unwanted network from the list of Preferred's. May want to uncheck the Remember networks.... option as well, to prevent auto-join.
If it insists to join the other network, it's probably cause the signal is stronger and the Wi-Fi protocols indicate a search for the strongest. Once you click OK, you can check the Ask to join networks option on the previous page, so at least you'll get asked (every time) and have some say in the matter.

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I have a MacBook Pro. My mac can detect wifi. But will not connect. I did get connected vis TCP/IP settings but I can't connect to any wifi anywhere. Network diagnostic has a green light for wi-fi and wi-fi settings. Red light for the rest.

I have a MacBook Pro. My mac can detect wifi. But will not connect anywhere. I did get connected via TCP/IP settings but I can't connect to any wifi anywhere. Network diagnostic has a green light for wi-fi and wi-fi settings. Red light for the rest. (Network settings, ISP, Internet and server.)

Hello NotAppleSavy,
Thanks for the question. After reviewing your post, it sounds like the computer wont connect to networks. I see you have used network diagnostic. I would recommend that you read this article, there are a lot of other things you can do in this article that may be able to help you resolve or isolate the issue.
Wi-Fi: How to troubleshoot Wi-Fi connectivity
Thanks for using Apple Support Communities.
Have a nice day,
Mario

Setting up new ipad 2. Won't accept my PW for my Airport Extreme (Wi Fi network?) Where is the PW for my WiFi? I am stymied. Can I set up through My MacBook Pro, which IS connected to my WiFi network?

Setting up new ipad 2. Won't accept my PW for my Airport Extreme (Wi Fi network?) Where is the PW for my Wi Fi? I am stymied. Can I set up through my MacBook Pro, which IS connected to my WiFi network?

If you could provide the make and model number of the modem that the AirPort Extreme will be connecting to, we can likely tell you a bit more about what to expect in the way of getting the AirPort set up and working.
Unfortunately, "plug and play" does not apply here. You will need to set up and configure the AirPort Extreme using your iPad or iMac to name the AirPort as a device, assign a device password, name the wireless network, assign a device password and a few other things.
Once the AirPort Extreme is set up, you can connect the PC to one of the LAN <--> ports on the AirPort Extreme using an Etherent cable.
The iPad and iMac will connect to the wireless network that the AirPort Extreme provides.

My MacBook Pro is not able to detect Toshiba LCD TV using HDMI Cable

Hello,
I am recently having an issue of connecting my MacBook Pro with Toshiba LCD 32 Inch i tried many troubleshooting scenarios but nothing came up on my LCD,
My Mac OS 10.6.6 with the latest updates from Apple, i tried to connect my Mac to Sony Pravia LCD Screen and it's work fine but not the case in TOSHIBA !,
Please advise me if it's something related to my TV.
Waiting reply from technical,

Hello Dear,
Thanks for response,
I check the TV Manual and it's support the "Extended display identification data (EDID)" and i already connect my PS3 on the TV using HDMI Cable, but when i connect the MacBook Pro screen flashed and nothing came up on the TV and this why i am trying to understand is it Mac issue or TV one,
Please review the following i copy it from the TV Manual and advise me,
"Connecting an HDMI or a DVI device
The HDMI input on your TV receives digital audio
and uncompressed digital video from an HDMI
device and uncompressed digital video from a
DVI device.
This input is designed to accept HDCP
programme material in digital from CEA-861-D
compliant consumer electronic devices (such as
a set top box and DVD player with HDMI and DVI
output).
The HDMI input is designed for best performance
with 1080i (50 Hz/60 Hz) and 1080p (24/50/60
Hz) high-definition video signals, but will also
accept and display 480i, 480p, 576i, 576p, and
720p (50Hz/60 Hz (60 Hz: except for E-EDID))
and VGA (VESA 640 × 480 @ 60/72/75 Hz)
signals.
• HDMI: High-Definition Multimedia Interface
• DVI: Digital Video Interface
• HDCP: High-bandwidth Digital Content
Protection
• CEA-861-D compliance covers the
transmission of uncompressed digital video
with high-bandwidth digital content protection,
which is being standardized for reception of
high-definition video signals. Because this is
an evolving technology, it is possible that some
devices may not operate properly with the TV.
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Identification
• Acceptable PC signal format:
S-VGA: VESA 800 5 600 @ 56/60/72/75 Hz
XGA: VESA 1024 5 768 @ 60/70/75 Hz
W-XGA: VESA 1280 5 768 @ 60/75 Hz
W-XGA: VESA 1360 5 768 @ 60 Hz
S-XGA: VESA 1280 5 1024 @ 60/75 Hz
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match the number of pixels of the LCD panel.
Therefore, the TV may not display small text
properly.
If you connect this unit to your PC, the
compressed image is displayed in S-XGA mode,
therefore the picture quality may deteriorate and
characters may not be read.
• L-PCM: Linear-Pulse Code Modulation"

Macbook air stopped connecting to The Cloud wifi network in the UK

I used to be able to connect to The Cloud wifi network in local bars, cafes and restaurants on all my apple devices, but my macbook air has stopped connecting to this network. My iPhone and iPad still connect no problem. The bar at the top of my macbook air tells me I'm connected to The Cloud wifi, but I am not taken to the login page and hence can not connect to the internet. This used to work no problem. I'm not sure, but this issue may have occurred around the time I installed OS X Mavericks. I have recently installed OS X Yosemite and still have the same connectivity problem. My macbook air connects to other wifi networks such as my home network and my work clients' networks. Any help or advice anyone can offer would be much appreciated.

G-band networks generally will have a stronger signal than n-band.
Tell it to ignore the g network and only connect to the N-band network.
Open Network System Prefs, select WiFi, and click Advanced...
Click on the WiFi tab.
Find you g-band network in the list and delete it.
Check the box to Remember networks this computer has joined.

My iMac and MacBook Pro have stopped being able to find one another.

I have been sharing files between my iMac and MacBook Pro. Recently they have stopped being able to detect one another. When I look in the sidebar of the Finder window, neither computer shows the other. I have file sharing enabled for both computers. This is a recent problem, and I'm not sure what has changed. I may have updated software - but don't remember what or when, as I tend to automatically do so when an update becomes available. I would appreciate any help that you can give.
Thanks,
Linda

Eric,
Thank you. I had all my settings right - I had checked and double checked. The one thing I had failed to do - which is the one thing that often helps - is to shut everything down and restart. I shut the router and the computers down and restarted them one at a time. They are once more talking to each other.
Thank you again,
Linda

MacBook Pro Retina stopped detecting wifi network in one location.

Hey everyone, experiencing kind of a weird problem and was hoping someone would be able to help. I was doing some studying at a Starbucks, connected to their WiFi network when randomly my computer lost connection to their network and was no longer able to detect that it even exists. I was worried this was some sort of problem with my wifi card as it could no longer detect any networks nearby, where as before it was detecting multiple networks in the area of the Starbucks. Oddly i was still able to connect to the network on both my iPad 2 and iPhone 4S. Upon returning home I was relieved to find that I was still able to connect to my home wifi network. Since then i've been to many locations with my laptop but not once had an issue connecting to or detecting wifi networks, with the exception being at that Starbucks location. I've returned many times hoping that the problem would somehow fix itself, and that maybe it was just a problem with their network, but that doesn't seem to be the case. It seems to be that for whatever reason something happened to the MacBook pro while I was at that Starbucks location that has caused it to no longer detect the wifi networks there, and only there. One possibility could be the I updated Mountain Lion to the 10.8.2 supplemental update while there, but I don't see how that would cause the problem. If anyone has any ideas as to a solution that would be greatly appreciated.
Thanks in advance!

I considered the network hog point, but I don't believe that I was using any excessive amounts of bandwidth. Also, because I can no longer detect any networks at the Starbucks location (not just the Starbucks network) I don't believe that this is the problem. Also, when I updated the operating system I was sure to disconnect from wifi first, I had already downloaded the update on my home network, just had yet to restart to install it, so my security shouldn't have been an issue either. How exactly can I go about masking my MAC address so I could double check to see if it was the network issue?
Oh, also, I booted into Windows 7 via boot camp and for some reason Windows is also unable to detect any networks while at Starbucks as well, which is even more confusing. I don't know if it's worth mentioning, but I bought this MacBook pro retina in Canada and am now in There UK for school. I've heard that north American macs don't play well with one of the network channels that is commonly used over here, so that also may play a role in all of this. But considering that I was able to consistently use their wifi for a couple weeks with no issue, I don't see how that could be the problem. As far as WEP encrypted goes, the network is unsecured so I don't believe that's the problem.
Thanks for the response, I appreciably appreciate it!

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I have an Epson printer on a Wifi network. Windows 7 desktop is running the network, and my wife's HP Win 7 laptop prints to it just fine. My MacBook Pro running Yosemite won't detect it, and I do have the latest driver installed. I didn't have a problem when I had a Canon Pixma on the network, but when I replaced it with the Epson nothing seems to work. I go to add a printer to the queue and only the FAX function of the printer shows up - not the WS-4530 print function. Does anyone out there have any suggestions? Please??? :-)

Hi Kelly,
As someone who has to print from my Mac to a networked printer at home all the time, I can certainly understand how frustrating it must be to have that fail to perform as expected. Let's see if we can get you up and running.
I would suggest that you troubleshoot using the steps in this article -
OS X Yosemite: Printing troubleshooting
Start with the section titled Check the network.
Thanks for using Apple Support Communities.
Sincerely,
Brett L

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Hi,
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Sachin Soni
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System Preferences>Network>Advanced. Drag your network to the top of the list. Check the box, "Remember networks this computer has joined." Delete the networks you don't want from the list. Click OK, then click Apply.

My Macbook Pro keeps connecting to the wrong wifi. How do I stop it from doing this?

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Thanks,
Stephen

Hello Stephen,
If you are having issues with sending and receiving email, check out the first two articles to get it sorted out. Also look at the third link and look at the time at which you were having issues as it may be related to an outage of service.
iCloud: Troubleshooting iCloud Mail
http://support.apple.com/kb/TS4002
OS X Mail: Troubleshooting sending and receiving email messages
http://support.apple.com/kb/ts3276
Apple Services, Stores, and iCloud
https://www.apple.com/support/systemstatus/
Regards,
-Norm G.

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I'm having the same problem. It just freezes and wont load the rest of the way.

My iTunes stopped being able to import all commercial CDs! Can't read them. Please help.

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I have pluged a portable battery to the USB and my macbook pro stopped working after that, right before it shut down there was a message on the screen that said something like " USB device is withdrawing so much power, please disconnect and connect again?

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BB1B2,
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Macbook Pro stops being able to detect wifi network

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