How Do You Forget a Network on Mac: What You Control and What You Don't

On macOS Ventura 13 or later, including macOS Tahoe 26, you forget a Wi-Fi network from Apple menu > System Settings > Wi-Fi: click Details next to the connected SSID and then Forget This Network, or open Advanced, click the More button beside a saved SSID, and choose Remove From List. Apple Support article 102480, published 17 June 2026, states that this removes the network and its password, that devices using iCloud Keychain with the same Apple Account forget it too, and that supervised Macs and managed networks can hide the control. A personal Mac will complete those clicks. An MDM Mac often will not.

Apple's 17 August 2026 version table lists the current Tahoe build as 26.6.2. Confirm the installed release with Apple menu > About This Mac. Monterey 12.7.6 and earlier use System Preferences > Network > Wi-Fi > Advanced and the minus button.

How do you forget a network on a Mac in System Settings?

Apple's Mac User Guide page "Reset or remove Wi-Fi network settings on Mac" splits the work. Resetting the network the Mac is using is a Details click. Removing a network the Mac is not using is an Advanced click. Support article 102480 documents only the Advanced path on Mac.

To forget the network the Mac is on right now:

1. Choose Apple menu > System Settings, then click Wi-Fi in the sidebar.
2. Click Details next to the connected network name.
3. Click Forget This Network, then confirm.

To forget a network the Mac has joined before but is not using:

1. Choose Apple menu > System Settings, then click Wi-Fi in the sidebar.
2. Scroll down and click Advanced to open Known Networks.
3. Click the More button next to the SSID, choose Remove From List, then confirm.

Apple's two official pages disagree on the confirm-button label. Article 102480 says "click Forget to confirm" after Remove From List. Michigan Technological University's service-desk article 53570, last modified 16 November 2023, tells staff to "click Remove to confirm." The User Guide names the menu item and stops. Use whichever button the dialog shows.

What is the difference between forgetting the active network and removing a saved one?

Forgetting the active network drops the live association and the stored credentials in one move. The Mac leaves that SSID immediately. Removing an inactive saved network deletes credentials for an SSID the radio is not using. The current session stays up.

The User Guide writes the first job as a reset and the second as housekeeping: "If you no longer use a Wi-Fi network, you can remove the network and its credentials from the known networks list." Article 102480 groups both with Auto-Join, which keeps the password.

Forget is the control when the password changed or the Mac keeps landing on the wrong saved name. Auto-Join is the control when the SSID is still useful. Apple's auto-join article 102169, published 12 June 2026, scores known networks from user actions: a manual join raises the score, a manual disconnect lowers it. Forgetting the SSID takes it out of that list.

A nearby SSID the Mac never joined cannot be forgotten. Article 102480 says the device can forget only known networks: networks it previously joined, or networks installed as managed networks through a device-management service.

What happens if you forget a Wi-Fi network on a Mac?

The Mac deletes the SSID from Known Networks and deletes the password. Article 102480 states that forgetting "doesn't prevent your device from discovering the network and showing it as available for you to join." The name can reappear under Other Networks as soon as the access point is in range. Joining it again requires the current password. Once joined, it becomes a known network again.

If iCloud Keychain is on, the forget propagates. Article 102480: "For any devices using iCloud Keychain with the same Apple Account, forgetting a Wi-Fi network on one device causes the other devices to forget the network as well." Apple's iCloud Keychain setup article, published 12 May 2026, describes that store as the place Wi-Fi passwords sync across approved devices.

The DHCP lease on the router is a separate clock. Apple's recommended-router article 102766, published 14 July 2026, tells administrators to set DHCP lease time to 8 hours on home or office networks and to 1 hour on hotspots or guest networks. IETF RFC 2131, written by Ralph Droms at Bucknell University in March 1997, does not pick those hours. It sets renewal time T1 at 0.5 of the lease and rebinding time T2 at 0.875.

Signal strength is unchanged by a forget. Apple's Platform Deployment roaming guide records that Mac computers hold the current BSSID until RSSI crosses –75 dBm, then look for a candidate 12 dB stronger. Cisco's enterprise WLAN white paper recommends a Mac cell edge of –72 dBm. The two numbers do not match. Hold Option and click the Wi-Fi menu to read RSSI.

When does Forget Network stay greyed out?

The control is greyed when the Mac does not own the profile. Article 102480 says that for some supervised devices and managed networks, "you might not have the option to forget the network or turn off Auto-Join." Apple's Developer documentation specifies payload type `com.apple.wifi.managed`, available on macOS since 10.7. The sample PayloadIdentifier is `com.example.mywifipayload`; the PayloadUUID is `94c487e0-d6f8-41e3-b66d-a89994e6919b`.

Apple's Configuration Profile Reference states that OS X 10.10 and later honor `PayloadRemovalDisallowed` when the profile arrived through an MDM server. Those profiles cannot be removed from the Profiles pane or with the `profiles` command, even as root.

On 7 May 2025, Jamf administrator miniberry reported the lock on every Mac in an education fleet: "this option is not available because this network was joined via a managed profile." Jamf Legendary Contributor AJPinto replied that the device has to be excluded from the profile. The MDM server can push the SSID back on the next check-in.

Bradley Chambers, who managed an enterprise IT network from 2009 to 2021 and writes Apple @ Work for 9to5Mac, put it this way on 3 May 2025: "If you're managing devices through a device management system and you've deployed a Wi-Fi profile, it will get priority over other networks." Article 102169 agrees.

On a personal Mac, check Device Management for a leftover profile.

How do you find the same Wi-Fi network after forgetting it?

Look in Other Networks, the User Guide's list of nearby SSIDs the Mac has not joined. Move the pointer over the name, click Connect, and enter the password. RFC 7268, citing IEEE 802.11, records that an 802.11 SSID is a maximum of 32 octets. Apple's router article 102766 requires one case-sensitive name across every band, and warns against default names such as linksys or netgear, because a Mac that has forgotten one "netgear" can still auto-join another.

If the network is hidden, it will not appear in Other Networks. Use Other at the bottom of that list and type the name, security type, and password.

Article 102766 recommends WPA3 Personal, or WPA2/WPA3 Transitional when older clients must still connect, and WPA2 Personal (AES) only when those modes are unavailable. Avoid WEP, TKIP, and WPA Personal. Apple Platform Security states that WPA2 and WPA3 provide 128-bit AES encryption. WPA3 Enterprise 192-bit, using 256-bit AES, is supported on Apple silicon Macs.

The current password lives on the router, or in the Passwords app on a device that never received the forget. Apple's Passwords User Guide for macOS Tahoe 26 documents View History, with dates, for website and app passwords, not for Wi-Fi entries. The network-password update date is the keychain Modified timestamp in Keychain Access Get Info. After a router password change, article 102766 says to forget the network on each device that had joined, then rejoin.

Which numbers sit on a saved Mac Wi-Fi network?

Eight figures decide whether a forget will stick. Ventura 13 opened System Settings. Apple's 17 August 2026 table lists Tahoe 26.6.2 as the current Tahoe build, with Sequoia 15.7.9, Sonoma 14.8.9, and Ventura 13.7.8 as the latest on those trains. An IEEE 802.11 SSID is 32 octets, as RFC 7268 records. Apple's 14 July 2026 router sheet sets security to WPA3 Personal when the hardware allows it.

Saved-network count has no ceiling in the Tahoe 26 User Guide. Count the rows under Advanced > Known Networks, or run `networksetup -listpreferredwirelessnetworks en0`. A 2015 Ask Different thread reported more than 100 names. DHCP lease time is 8 hours for home or office and 1 hour for guest networks on that same router sheet. RFC 2131 supplies T1 at 0.5 and T2 at 0.875 of the lease. Signal strength is RSSI in dBm: Apple's roam trigger is –75 dBm, Cisco's Mac cell-edge recommendation is –72 dBm. The profile identifier in Apple's Developer sample is PayloadIdentifier `com.example.mywifipayload` and PayloadUUID `94c487e0-d6f8-41e3-b66d-a89994e6919b`. The network-password update date is the keychain Modified timestamp, not a field on the Wi-Fi Details pane.

How a personal Mac differs from an MDM-managed Mac

| Property | Active network, personal Mac | Inactive saved network, personal Mac | Network pushed by MDM | | --- | --- | --- | --- | | Control | Wi-Fi > Details | Wi-Fi > Advanced > Known Networks | Device Management profile | | Menu item | Forget This Network | Remove From List | Often unavailable | | Session drops now | Yes | No | No, unless IT removes the profile | | Password deleted here | Yes | Yes | No; the payload still holds it | | User can finish the job | Yes | Yes | No |

A personal MacBook Air uses the same System Settings path as any other Mac. Apple's Tahoe 26 compatibility list, published 8 June 2026, includes MacBook Air (M1, 2020) through MacBook Air (15-inch, M5). If a `com.apple.wifi.managed` payload is installed, the user does not control the SSID.

Chambers wrote that a manual preference "sticks until the user manually changes it again or forgets that network." On a personal Mac, that sentence is the whole job. On a managed Mac, forgetting is an IT ticket.

FAQ

How can I completely forget a Wi-Fi network?

On macOS Ventura 13 or later, open System Settings > Wi-Fi. Click Details then Forget This Network for the connected SSID, or Advanced then Remove From List for a saved one. Apple Support 102480 says this deletes the password. iCloud Keychain repeats the forget on other devices with the same Apple Account.

Why is Forget Network greyed out on a Mac?

Apple Support 102480 says some supervised devices and managed networks hide Forget and Auto-Join. The lock is a Wi-Fi payload of type com.apple.wifi.managed, identified by PayloadIdentifier and PayloadUUID. Check System Settings > General > Device Management. A leftover personal profile can be removed; a work Mac stays locked until IT removes the scope.

How can I find a Wi-Fi network after forgetting it?

Open System Settings > Wi-Fi and look under Other Networks, the list of nearby SSIDs the Mac has not joined. Click Connect and enter the current password. A hidden SSID will not appear; use Other and type the name. Forgetting never stops the radio from seeing the access point. It only deletes the saved credentials.

What happens if I forget a Wi-Fi network?

The Mac removes the SSID from Known Networks and deletes the password. Auto-join stops. The network can still show as available. Rejoining requires the password. With iCloud Keychain on, other devices on the same Apple Account forget it too. The router's DHCP lease time, 8 hours on Apple's home recommendation, is unchanged.

How can I forget a network on a MacBook Air?

Use the same System Settings > Wi-Fi path as any Mac: Details for the active SSID, Advanced > Remove From List for a saved one. Apple's 8 June 2026 Tahoe 26 list includes MacBook Air from the 2020 M1 through the M5 models. An MDM profile greys the control on an Air as it does on a Pro.

Why am I unable to forget a Wi-Fi network on a Mac?

Either the Mac never joined that SSID, so Forget is absent, or a managed profile owns it, so Forget is greyed out. Article 102480 allows forgetting only known networks. If Device Management lists a Wi-Fi payload, the PayloadIdentifier is what has to be removed. A leftover personal profile can be deleted. A supervised work Mac needs the administrator.