Mac perd la connexion Wi-Fi

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Niveau 1

5 points

Mac perd la connexion Wi-Fi

Bonjour à tous,

J'ai un soucis avec la connexion wifi de mon MacBook Pro Touch Bar. Il perd la connexion de façons récurante, c'est très chiant pour la navigation. Je suis obligé de désactiver puis réactiver le wifi pour que cela remarche. Je serais presque tenté de dire que c'est depuis la MAJ Mojave, mais je n'en suis pas sure. Une solution ? je ne vois pas trop quoi faire d'autre.

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Publiée le 6 nov. 2018 à 01h18

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Answer 1

Meilleure réponse

Fontom

Niveau 10

105 865 points

Le 11 nov. 2018 à 14h45 en réponse à quentinra

voir ceci : Résolution des problèmes de connectivité Wi-Fi - Assistance Apple

sinon faites ceci : Utiliser le mode sans échec pour isoler des problèmes avec votre Mac - Assistance Apple

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Answer 2

Jessica001

Niveau 3

892 points

Le 11 nov. 2018 à 14h45 en réponse à quentinra

Procédure en anglais pour créer un nouveau réseau wifi proprsimproboeme persiste faut changer la carte wifi

Creating a New Wi-Fi Configuration in macOS High Sierra

Back up your Mac before continuing, these steps involve removing system level configuration files. Do not proceed without a backup made so that you can roll back if something goes wrong.

First, turn off wi-fi by pulling down the wi-fi menu bar item in the upper right corner and selecting “Turn Wi-Fi Off”

From the Finder, create a new folder onto the desktop (or another user folder) and call it something like “WiFiConfigBackup”

Go to Finder in macOS, and pull down the “Go” menu, then choose the “Go To Folder” option

Enter the following directory path into window and then click on “Go”

/Library/Preferences/SystemConfiguration/

Find and select the following files that are located within the now open SystemConfiguration folder

com.apple.airport.preferences.plistcom.apple.network.eapolclient.configuration.plistcom.apple.wifi.message-tracer.plistNetworkInterfaces.plistpreferences.plist

Drag those files into the folder “WiFiConfigBackup” you created in the second step (alternatively, if you’re advanced, have a backup, and know what you’re doing, you can remove them)
Restart the Mac by going to the  Apple menu and choosing “Restart”, then let the Mac boot up as usual
Return to the Wi-Fi menu in the upper right corner and choose “Turn Wi-Fi On”, and then join the wireless network as usual

Essentially what this is doing is ditching your old wireless preferences and causing MacOS High Sierra to replace them by generating new wi-fi preferences. For many users, this is sufficient to solve any problems with wifi networking.

Optional: Make a New Custom Network Location

If you’re still having wi-fi problems after ditching the preferences and rebooting the Mac, you can try the steps below to create a new network location with custom configuration settings.

Go to the  Apple menu and choose “System Preferences”

Select the “Network” panel then choose “Wi-Fi” from the list

Near the top of the preference panel, pull down the “Location” menu and select “Edit Locations” from the dropdown

Click the [+] plus button to create a new network location, name it something like “FixWiFiCustomConfig” or whatever is easily identifiable to you, then click on “Done”

Alongside Network Name, pull down the dropdown menu and select the wi-fi network to join, enter the password if applicable

Click on the “Advanced” button in the corner of the Network preference panel

Choose the “TCP/ IP” tab and click on “Renew DHCP Lease”

Next go to the “DNS” tab, and within the “DNS Servers” section click on the [+] plus button then add the following IP addresses (one entry per line, by the way these are Google DNS servers, you can use others if you’d prefer but these are particularly easy to remember and ubiquitous):

8.8.8.88.8.4.4

Next, select the “Hardware” tab and set the ‘Configure’ option to “Manually”

Adjust the “MTU” option to “Custom” and set the number to “1453”

Now click on “OK”
Finally, click on “Apply” to set the network changes you just made for the new network location
Exit out of System Preferences
Open Safari or Chrome, and visit a website – it should load fine

This sequence of trashing wi-fi preferences, generating new wireless preferences, and then, if need be, creating a new network location with custom DNS and MTU are a longstanding set of steps for resolving various wireless problems in many versions of Mac OS, including Sierra, El Capitan, and before.

High Sierra Wi-Fi still not working?

If you’ve done all of the above and you’re still having issues with wireless networking, you can try some general troubleshooting tips too;

Try to connect to a completely different wi-fi network, if wi-fi works fine with other networks it could be an issue with the router
Connect a completely different device to the same wi-fi router, does it work fine?
Try adjusting the wi-fi router channel, or using 2.4GHZ instead of 5GHZ (or vice versa)

If all else fails and wi-fi worked fine before using High Sierra, you can downgrade macOS High Sierra to a prior version of macOS assuming you made a backup with Time Machine before updating to High Sierra. Downgrading is rather dramatic and should be considered a last resort

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Answer 3

quentinra Auteur

Niveau 1

5 points

Le 11 nov. 2018 à 14h45 en réponse à quentinra

J'ai essayé tout les manipulations et une a apparement fonctionné, celle du mode sans échec. J'ai mis du temps à répondre pour essayer toute les manip et être sur qu'elles fonctionnent ou non. J'espère que ça va continuer comme ça. Merci à tous en tout cas, j'ai appris pas mal de chose sur MacOs et cela me fait très plaisir. C'est une vrais merveille ce macbook (Ancien utilisateur confirmé de windows).

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