I have been using my MacBook Air for the last 4 years and it works with no issues. Till yesterday, I had no problems with its speed - with or without internet connection. From today morning, when I connect it to internet, the net connection is very very slow - it is in the range of few hundred Kbps.
I have an internet connection of 100 MBps and I checked with other laptops, my iPhone, my iPad and there is no issue with the ISP or wifi router as other devices give a fantastic speed. Only my mac air is not able to connect at high speeds. It loads a simple page after 10 minutes or so. I cleared all cache, cleared safari temp files. Rebooted the machine. My disk is only half full.
This is the maximum transmission speed of your wireless adapter. If you own a newer Mac computer, the chances are that it will be capable of much faster WiFi transmission speeds than your wireless router. The best way to find out for sure is to look up the model name of your wireless router online and study its technical specifications. Your older MacBook is accessing the 2.4 GHz band with its older radio. Now alter your settings in the Air so it to is accessing the same 2.4 GHz band. You should now see the same performance numbers! From the same location in your house.
I don't run any crapware / anti virus. Please help me. Thanks in advance. In my experience, if even other devices do not have an issue with a particular router, it is still good practice to rule this out. But it's certainly your call.
With your MBA as close as possible to this wireless router, please provide the following values from the Wi-Fi icon on the macOS menu bar. Note: Hold down the option key before clicking on the icon to get these values. • Security • Channel • RSSI • Noise • Tx Rate • PHY Mode • MCS Index Now relocate your MBA to where you normally use it, and note the same values again. Please post your results.
In this case the MCS Index of 15 for a 802.11n connection still does not achieve the highest data rate possible. Like in the first case, your MBA is only connecting with two spatial streams on this channel. Which is only 20 Hz wide. This would reflect the 145 Mbps Tx Rate. The only thing I am not sure of at this point, is if a 2013 MBA is capable of connecting with three streams.
![Mac Mac](https://support.apple.com/library/content/dam/edam/applecare/images/en_US/macos/highsierra/macos-high-sierra-menu-bar-wifi-networks.jpg)
How to check mac for specific text. If it doesn't then, there doesn't appear to be any issues as far as I can tell. But if it does, then it may be possible that the built-in Wi-Fi card on your MBA may be faulty.
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Hi guys, Just got my new rMBP and I absolutely love it. However, since installing the various updates the WiFi speed has become ridiculously slow. When I downloaded the updates I was getting 1.8mb/s (the maximum speed for our internet connection in the office). Since the update I struggle to get higher than 300kb/s from a source I know will max out the connection here. I've tried turning on/off the WiFi, forgetting the wireless network and rejoining, rebooting and shutting down completely.
Has anyone else experienced an issue? Perhaps it's not exclusive to the retina MBP.
Hi guys, Just got my new rMBP and I absolutely love it. However, since installing the various updates the WiFi speed has become ridiculously slow. When I downloaded the updates I was getting 1.8mb/s (the maximum speed for our internet connection in the office). Since the update I struggle to get higher than 300kb/s from a source I know will max out the connection here.
I've tried turning on/off the WiFi, forgetting the wireless network and rejoining, rebooting and shutting down completely. Has anyone else experienced an issue? Perhaps it's not exclusive to the retina MBP.
Note for those who stumble on this thread, you should also try turning OFF bluetooth. Note although the signal:noise (dB) seems to improve, the network traffic shows much lower packets/sec using speedtest.net as the test down/upload site. Bluetooth can significantly interfere with wifi performance. I see drops from ~30Mbps to 0.5-3Mbps switching bluetooth on, only on my rMBP — my 2010 MBP sat next to it keeps a ~30Mbps download speed irrespectively.