Since upgrading my iMac to Lion, the WiFi shows up as "no hardware installed" on the desktop. This is after showing a grey progress bar on the white boot screen. It only happens on first boot but works fine after a restart. I have tried deleting the Preferences folder as has been suggested for some MGP users. Does anyone have any thoughts?
iMac 2011, Core i7, 12GB RAM, OS X Lion
iMac, Mac OS X (10.7), 12GB RAM
sudo rm -f /var/vm/sleepimage fixed it for me.
rsilvers, could you expand on that a bit? I would love to not send my imac back, but wireless would be nice as well.
Open a terminal window. Type:
sudo rm -f /var/vm/sleepimage
It may ask for the administrator password. Type that in.
Then reboot the machine. I did a hard reboot where I held down the power button until it forced a restart without saving anything.
It started back up, and the wifi hardware was working again.
So. Turned off the computer. Closed the laptop and Turned it over on its screen and pressed down on the back panel on all for corners. Fixed the problem. It is a hardware flex cable issue.
I just had the same problem today. All what I did is turn off my bluetooth, and then restarted my Macbook pro, and it worked for me!
I have tried all of the solutions listed previously and none of them are working for my 2012 MacBook Air.
Well !!!!
I thought my issue was related to the 10.8.5 update,
My machine since the update started saying no wifi hardware etc and also freezing .
Ive just spent 4 hrs doing a time machine back to pre 10.8.5
all was well, but it went to sleep and for the 1st time ever wouldnt wake up ... hard reset and yes you guessed it no hardware error !!!, several resarts later and its back on ...
Ive got to say this is the last apple anything I buy ...
Bought an iphone 5 last week ... battery lasts 1 day with everything turned off if im lucky ...
Update ...I finally sorted my problem out, I removed the wireless card unhooking all the associated cables, guides on youtube, put it all back after cleaning connections with alcahol ... its been over a week now with no issues ... not one
From what I can tell this is a software problem. If it were a hardware problem the wireless wouldn't work no matter what you boot with.
When I boot it up in anything except my normal OS, which is mavericks right now, like windows 7, I can connect just fine. The same thing happens if I were to connect when it gives me the option to choose my boot path, I can connect.
I have tried pretty close to all of the "solutions" I can find and some of them sometimes let me use wifi for maybe 10 min. Deleting the sleep image works the most for me but so does restating my PRAM and restarting my SMC. But like I said only sometimes works.
Apple needs to not only admit there is a problem but also do something about it.
Also if anybody knows another way that could potentially fix this problem if it were a software problem then post something, that would be wondrous.
Mines working now and I thought I'd put my 2 cents in.
I have a Mid-2010 macbook pro. Came with snow leopard installed on it. I had this "No wifi installed" issue for quite some time and I WAS running mountain lion. Things that I've tried:
Nothing worked for me. I resorted to using a USB network adapter and thought that it was just a case of me using my computer everyday for 6-8 hours a day for 3 years. Things get old and circuits get fried... even apple can't stop that. I'm not even going to try and understand the world of modern day computing and the fact that these computers are so far advanced than what I ever thought imaginable, therefore I'm not going to criticize the programmers at apple or ANYWHERE else for that matter. The only thing I could say is that someone should from apple should be around to stop this panic and do some PR work to do damage control.
Anyway because of another issue I ended up reinstalling my osx. this time with snowleopard using the OSX that was designed for my computer - Snow Leopard. Althought it's a step backward things in terms of my OS my WIFI has come back! stoked about that.
Some of the apps I need required I have Lion installed so I carbon copy cloned my hard drive (just in case) and I upgraded to Lion (not Mountain Lion) and my WIFI seems to still be working perfectly, no complaints (I'll keep my fingers crossed).
My issue (on my computer anyway, I know it's gonna be different for everyone) was that Mountain Lion doesn't play nice with my WIFI card. I'll stick with Lion for now and probably forever on this machine.
Good luck everyone.
Brmusic1 wrote:
So. Turned off the computer. Closed the laptop and Turned it over on its screen and pressed down on the back panel on all for corners. Fixed the problem. It is a hardware flex cable issue.
Tried everything and still same wifi: no hardware installed error, so thought why not. switched off, closed lid, pressed all four corners, open lid, powered on. WIFI is back. Must be hardware issue
Hi Folk
I joined this forum specifically to say that switching off, closing the lid and pressing all four corners worked for me.
It looks like a hardware/build quality issue.
Open a terminal window. Type:
sudo rm -f /var/vm/sleepimage
This solved my problem. I upgraded to 10.9 and start having this issue randomly. ANyway, for the time being it seems to be working.
TEMPORARY SOLUTION:
An apple employee gave me this solution, and it is working so far
SMC RESET
Plug in MacBook
Shutdown
Hold down control,option,shift, and power buttons for 30 seconds or until computer turns back off
Turn on
If wifi is not on go into system preferences>network
Click the plus sign and add wifi
Click apply
If the dot next to wifi is not green, restart
Hope this helps!
I recently got the same problem on my MacBook Pro 2012 running Mavericks.
I had recently upgraded to an SSD but also replaced the optical drive with a HDD. Replacing the optical drive is definately not as easy and requires unplugging a lot of peripherals one of which includes the bluetooth and Wi-Fi.
I thought that could be the problem so shut down the Mac, opened it up and checked all of the connections to the back of the new HDD enclosure which were fine. I then followed one of the cables (ribbons?) to the back right of the laptop (the one under the power button). Sure enough the connection there was loose. I made sure this was firmly back in place. Replaced the back. Booted her up and Wi-Fi is back.
I believe this may happen again because the black casing is not completely secure and missing a couple of screws, which with some use could cause the cable to come loose again. It also means my laptop speaker distorts at the highest volume I am guessing because it is not secure it is vibrating against the casing, so I need to get some more screws and properly fix this.
If these software fixes do not work then it is most likely a hardware issue.
If you can open up your Mac then have a look, if not as previously mentioned just try applying some pressure to the four corners with the Mac booted down. Failing that you will need to take it to the Apple Store.
Hope that helps.
Lion - WiFi no hardware installed
