Questions tagged [wifi]

Wireless local area networking, also known as "Wireless Internet"; stands for "WIreless FIdelity"

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104
votes
4answers
126k views

How does the Mac choose which connection to use when both Wifi and Ethernet are connected?

When I'm connected to two networks with separate routers using Wifi and Ethernet, how does my Mac know what connection to use when I visit a website?
97
votes
7answers
74k views

How can I prevent an SSH session from hanging in OS X Terminal?

When I close my MacBook with an active SSH session in Terminal and then wake it up, the prompt goes unresponsive. In about five minutes it says Write failed: Broken pipe and terminates. This ...
81
votes
9answers
89k views

Wi-Fi disconnects when I lock the mac

Everytime I lock my mac and log back in two minutes, It has disconnected the wi-fi network. Is there a setting to disable this? Model: Mac Book Pro - 15-inch, Mid 2010 I lock it by clicking 'Login ...
73
votes
7answers
2.5m views

Is there any way to view saved wifi passwords on the iPhone?

I've previously connected to a wifi network on my iPhone but I've no way of finding out the password. So is there any way to view saved wifi passwords on the iPhone?
72
votes
12answers
191k views

How do you force a 5 GHz wifi connection?

Wifi networks are often set up in dual-band mode, with the same SSID served on both 2.4 GHz and 5 GHz bands. I'd like to always use the 5 GHz band (due to interference with Bluetooth and other devices ...
65
votes
9answers
100k views

How to automatically login to captive portals on OS X?

How can I automatically login to captive portals on OS X? A captive portal is used by (often not password-protected) wireless networks that present a web page as soon as you connect to them, ...
45
votes
8answers
109k views

Wifi Keeps Dropping Macbook Pro 13in Retina Early 2015

I've tried everything I can think of. Resetting the router, changing the channel number and band. The internet connection is fine, and then just hangs for a minute or 2, then returns to normal. ...
41
votes
3answers
8k views

Has the WiFi KRACK vulnerability been patched for iOS?

There is a new vulnerability in WPA2 called KRACK (short for Key Reinstallation Attack), as described in The Guardian article: 'All WiFi networks' are vulnerable to hacking, security expert ...
39
votes
5answers
37k views

Bluetooth and WiFi interfering with one another since Yosemite

Note: The only thing that changed in my setup is installing Yosemite. Since installing Yosemite, I'm having a somewhat peculiar problem: WiFi works fine, and BT works fine. But WiFi + BT working ...
33
votes
6answers
48k views

IOS 10 warning: Using a hidden network can expose personally identifiable information

I am aware that 'hiding' a wifi network/SSID does not make the network MORE secure, but Apple's warning on IOS 10: Using a hidden network can expose personally identifiable information seems to ...
32
votes
2answers
48k views

How to tell if Macbook is using 802.11ac

I just got a new Macbook Air and a new Airport Extreme, both of which support 802.11ac. Is there an easy way to tell if my Macbook Air is connecting to the Airport Extreme via 802.11ac? Relatedly, ...
31
votes
4answers
3k views

How does iOS and OS X detect when a Wi-Fi network is a personal hotspot?

When there is a Personal Hotspot network available, it displays a chain link icon instead of the usual lock icon in the list of available networks on iOS and OS X. My question is, how does OS X ...
29
votes
8answers
91k views

How can I stop my MacBook Pro from automatically sleeping when I lock the screen?

Whenever I lock my screen (via either the lock icon -> Lock screen or by using the Control+shift+eject key combination), my screen immediately turns off (not showing the screen saver), and the system ...
29
votes
2answers
99k views

Keep wi-fi connection while asleep?

Right now my MacBook Pro is set to go to sleep after 1 hour and then when I wake it back up, I have to wait for it to find/connect to Wi-Fi again. How can I maintain the Wi-Fi connection so when I ...
29
votes
5answers
177k views

Is there an application like Connectify for Mac OS X Lion?

There is a well known app for Windows named: Connectify, used to share a wifi connection between a computer that only has wifi with other devices which requests that connection from the computer. ...
27
votes
4answers
118k views

Why won't my MacBook Pro connect to Wi-Fi networks that use a sign-in page (captive portal)?

Some wi-fi networks require viewing and agreeing to terms before Internet access is allowed. When my MBP connects to such a network, it attempts to redirect and isn't able to connect. I tried all ...
27
votes
7answers
32k views

Can I “Forget this Network” when the wifi network is not in range?

I have an iPod Touch that I upgraded to iOS 4 (but this an issue that also existed in iOS 3.1). When I travel, and I join a WiFi networks (e.g. hotel, etc), I don't always remember to forget the ...
26
votes
7answers
39k views

How to enable faster WiFi Roaming with Mac OS X & Airport base stations

How can I change the way Macbooks roam on the WiFi network? I would like to speedup the roaming of Macs (and maybe other devices). Is there a setting on the Airport base stations or in Mac OS to ...
25
votes
11answers
122k views

Mac won’t display WiFi login box after upgrade to El Capitan

I don’t know if the upgrade to El Capitan is relevant or not, but lately I’ve noticed I can’t connect to the Internet via public WiFi hotspots with my MacBook Pro. I can connect to WiFi networks ...
25
votes
1answer
43k views

Is there a Mac OS X equivalent of the Linux iwconfig command?

I'm looking for a command line tool in Mac OS X that performs the equivalent of the iwconfig command in Linux. Example: kirkland@x220:~/src/byobu/byobu$ iwconfig wlan0 wlan0 IEEE 802.11abgn ...
25
votes
1answer
787k views

What, precisely, does “reset network settings” do on an iPhone?

I use "internet sharing" on my Mac, but lately I've been having trouble connecting my iPhone 5 to the resulting WiFi network. I've read advice online to do Settings -> General -> Reset -> ...
25
votes
2answers
11k views

How to set custom DNS entry for a particular wifi connection

Is there a way to set custom DNS settings for a single wifi connection without affecting other connections? I use my laptop at home and work. When at work I need to type in an IP address of a local ...
23
votes
2answers
28k views

Can I force Mac OS X to select certain Wifi network?

When I turn on Wifi on my MacBook, it always selects some open network. Can I somehow force the system to choose another network (it is password-protected but I have the password stored in the ...
23
votes
3answers
35k views

MacOS 10.14 Mojave public beta public Wi-Fi problem

I can not connect to a single public Wi-Fi hotspot that does not require a password but instead shows a pop-up window pointed to captive.apple.com The pop-up opens blank with the error "The web page ...
23
votes
6answers
42k views

Constantly dropping internet on El Capitan?

I have a brand new 2015 mac, el capitan 10.11.4. The wifi constantly drops. I have re-installed a fresh el capitan, reset SMC, created new wifi profile/location with google dns, safeboot, updated ...
23
votes
14answers
112k views

How can I set the priority of Wi-Fi networks on my iOS device?

I have two Wi-Fi networks in my house, one at one end of the house and one at the other. While signals crossing from one side of the house are usually audible on the other side, they are generally ...
23
votes
7answers
107k views

How do I troubleshoot my Wi-Fi connection when an exclamation mark appears?

Sometimes, when I am in a public Wi-Fi an exclamation mark appears in the greyed out Wi-Fi icon. I can connect to the Wi-Fi (I get assigned an IP address), but I cannot establish an internet ...
22
votes
5answers
94k views

AirDrop: Bluetooth or Wi-Fi?

How does AirDrop work? I thought it is just Bluetooth, but I am starting to doubt that now. Whenever I turn AirDrop on, my Wi-Fi and Bluetooth are automatically turned on. If I turn the Wi-Fi off, ...
21
votes
4answers
40k views

Get rid of “The Wi-Fi network … could not be joined.” message

How can I get rid of this message? I've tried clicking both: "Cancel" and "Run Diagnostics" buttons. I've also tried to turn off and back on the Wi-fi. I don't want to restart my mac as there are ...
21
votes
7answers
8k views

MacBook Pro experiencing ping spikes to local router

I'm experiencing extreme ping spikes to my AirPort Extreme (local IP: 192.168.1.1), however I am not getting these ping spikes on another MacBook Pro right next to it. Here are my ping results. ...
21
votes
12answers
20k views

Start/stop internet sharing from a script?

Is there a way to start/stop internet sharing from the command line or maybe an apple script? The thing is that I move around my laptop between home and work. At one place I get wireless internet (...
21
votes
5answers
305k views

How can I tell which band (2.4GHz or 5GHz) my iPhone's WiFi connection is on?

I have two access points for the same network in my house, with some overlap. One runs on 2.4GHz only, and one transmits both 2.4GHz and 5GHz. I have an iPhone 5 (running iOS 6.0.1), which supports ...
20
votes
3answers
12k views

Run program if connected to specific wifi?

Is it possible to have a program starting automatically when I connect to a specific router, and having it stop when I disconnect from this router? Basically I want a program to run while I'm at work ...
20
votes
2answers
166k views

Connecting using WiFi Protected Setup in OS X

I have a MacBook Pro, and in OS X (running Lion), I can't figure out how to connect using the WiFi Protected Setup feature of my router. When I boot into Windows (Windows 7), using Boot Camp, I have ...
19
votes
5answers
40k views

How to get OSX to pick the strongest wifi signal with identical SSIDs?

I have a Netgear wireless router in one room, and a TP-Link powerline adaptor with wifi in another room. I'm using a 2014 MacBook Pro with Yosemite 10.10.1 Previously I had separate SSIDs for each of ...
19
votes
2answers
57k views

How to use WiFi and Ethernet at the same time

Brief Description: I need my Ethernet card (en0) to see all traffic under 192.168.2.xxx. However I also need to use WiFi card (en1) for all other traffic. OS: OS X Lion I am using a separate ...
19
votes
6answers
15k views

USB-C Dongles killing Wifi on 2016/2017 MacBooks – Who’s to blame?

I recently switched from my beloved MacBook Pro Retina (Late 2013) i5 2.6/16/512 to MacBook Pro (2017) Non-TB i5 2.3/16/512. I purchased what from the build-quality looked like a good USB-C-to-...
19
votes
1answer
63k views

How do I “blacklist” a wireless network on my Mac?

My home wifi network is password protected, as it should be. My neighbor's is not. Because I have password protected my network, my computer continually joins my neighbors instead of mine. I have ...
18
votes
11answers
58k views

Equivalent of airodump-ng for Max OS X

Is there any equivalent of airodump-ng for Mac OS X (it only runs on linux), providing an overview of the current wireless traffic on nearby Access Points, i.e: number of captured data packets list ...
18
votes
7answers
35k views

How to find the currently connected network service from the command line?

I would like to find out which of the available network services (e.g. Ethernet or Wi-Fi) is currently active. In this screenshot from the Network Preferences, you can see that Wi-Fi is currently ...
18
votes
10answers
86k views

Differentiating Apple products by their MAC addresses

Apple has registered a ton of MAC address ranges for its products. Does anyone know whether it's feasible to reliably identify which Apple product (particularly iPad, iPod, iPhone, and MacBooks) a ...
17
votes
5answers
8k views

How to change network connection order?

I have multiple network access in the same area. How can I reorder the priority to which the connections are made ?
17
votes
1answer
5k views

If my Mac is connected to ethernet and WiFi, which will it use?

As per title. I have ethernet issues at home and if I just turn WiFi on my MacMini, will this take over or will it default to ethernet unless I pull the cable out?
17
votes
8answers
4k views

Will Time Capsule work on a college dorm's WiFi network?

My daughter is headed off to college. I'd like to send her off with a Time Capsule so she can wirelessly backup her MacBook automatically. My concern is that Time Capsule will not work properly on ...
17
votes
3answers
9k views

Can I connect to a specific access point by BSSID?

Is there any way to get Mac OS X to connect to a specific access point by BSSID? I have a network with the same SSID for multiple access points, and I would sometimes like to specify which specific ...
17
votes
6answers
33k views

Solving an “wireless tools not found” error from airmon-ng tool

I am trying to use airmon-ng on Lion, but getting this error msg. $ sudo !! sudo airmon-ng Wireless tools not found I installed aircrack with ports. I heard it is possible to use it with lion, but ...
16
votes
9answers
98k views

Wifi doesn't work unless I turn it off then on again

I have a MacBook Pro 15" with retina display that I use for work/personal stuff and I always shut down with Wifi having been on. When I startup my Mac the Wifi icon looks like it's searching and never ...
16
votes
15answers
52k views

Wi-Fi connection randomly disconnects on 2012 MacBook Air

My 2012 MacBook Air has problems with Wi-Fi – random disconnections, every few minutes. The problems occurred with Lion, and persist after an upgrade to Mountain Lion. It seems the Wi-Fi drops ...
16
votes
3answers
200k views

Can an Airport Express be used to extend the Wi-Fi of another-non Apple Access Point?

My colleague has a cheap Cisco Access Point on another floor. He is using a Mac Pro and the the Wi-Fi is very spotty. Can an Airport Express be used to extend this network?
15
votes
2answers
16k views

How to disconnect from wifi on Mac OS X

How does one disconnect from a wifi hotspot on Mac OS X? The only way I found how is to Turn Wi-Fi off then back on and finally select a different access point... Surely there must be a better way.