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Why macOS Updates Break Wireless Printer Connections

Why Won’t My Mac Find My Wireless Printer After a macOS Update? (Fix in 5 Steps)

Updating your Mac to the latest macOS version is supposed to keep your computer fast, secure, and packed with modern features. But for many users, completing an update leads to a frustrating surprise: your Mac suddenly stops finding your wireless printer. Why macOS Updates Break Wireless Printer Connections

Whether your printer appears as “Offline,” keeps searching without finding a device, or completely disappeared from your Printers & Scanners menu, you are not alone. Operating system upgrades frequently alter security permissions, clear saved network configurations, and invalidate legacy print drivers.

In this guide, we will walk you through 5 proven troubleshooting steps to get your HP, Canon, Epson, Brother, or Lexmark wireless printer reconnected to your Mac.

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Why macOS Updates Break Wireless Printer Connections

When macOS installs a major system update, several background settings change simultaneously:

  1. Local Network Security Restrictions: Recent macOS releases require explicit user permission for print helper applications to access your Wi-Fi network.

  2. Outdated or Incompatible Drivers: Older printer drivers designed for previous macOS releases often break when kernel or security frameworks update.

  3. Corrupted Print Spooler Cache: Preserved print job data and cache files from the older OS version can block new print commands.

  4. Router & AirPrint (Bonjour) Disconnects: Network updates can break the AirPrint/Bonjour discovery service that allows your Mac to locate devices over Wi-Fi automatically.

Follow the step-by-step guide below to resolve these issues.

Step 1: Check macOS “Local Network” Security Permissions

Recent versions of macOS require third-party applications and print utilities to explicitly request access to discover local network devices. If this permission was revoked or blocked during the update, your Mac will never discover your printer over Wi-Fi.

  1. Click the Apple Menu () in the top-left corner and select System Settings.

  2. Navigate to Privacy & Security in the left sidebar.

  3. Scroll down and click Local Network.

  4. Look for your printer brand’s software (e.g., HP Smart, Epson Setup, Canon Utilities, or printer helper apps like rastertoescpII).

  5. Ensure the toggle switch next to your printing utilities is turned ON.

  6. Restart your Mac and check if your printer appears.

Step 2: Toggle Wi-Fi & Reconnect Both Devices to the Same Band

After an update, Macs often reconnect to a 5GHz Wi-Fi band, while many wireless printers only support 2.4GHz networks. If your Mac and printer are on separate subnets, they cannot communicate.

  1. Check Your Wi-Fi Network Name: Click the Wi-Fi icon in your Mac’s menu bar. Ensure it is connected to the exact same SSID (network name) as your printer.

  2. Reboot the Router: Unplug your Wi-Fi router for 30 seconds, plug it back in, and wait until the network fully restores.

  3. Power Cycle Your Printer: Turn off your printer, wait 60 seconds, and turn it back on to force it to request a fresh IP address from your network.

Step 3: Add the Printer Manually via IP Address

If Bonjour/AirPrint automatic discovery fails to locate your printer in the standard search list, adding it directly via its network IP address bypasses automatic detection completely.

1. Find Your Printer’s IP Address

Print a Network Configuration Page directly from your printer’s control panel/screen, or check your router settings. Look for an address formatted like 192.168.1.XXX.

2. Add the IP Printer in macOS

  1. Open System Settings > Printers & Scanners.

  2. Click Add Printer, Scanner, or Fax…

  3. Click the Globe / IP Icon at the top of the window (middle tab).

  4. Enter your printer’s IP Address in the Address field.

  5. Set Protocol to IPP (Internet Printing Protocol) or Line Printer Daemon (LPD).

  6. Under Use, select AirPrint or choose Select Software to locate your printer’s driver manually.

  7. Click Add.

System Settings  -->  Printers & Scanners  -->  Add Printer  -->  IP Tab (Globe Icon)

Step 4: Reset the macOS Printing System

If your Mac still refuses to communicate with the printer, corrupted preference files in the print subsystem are likely blocking connection requests. Resetting the printing system clears stuck jobs, corrupt configurations, and corrupted print queues.

Warning: Resetting the printing system removes all printers and scanners from your Mac list. You will need to add them back after the reset.

  1. Go to System Settings > Printers & Scanners.

  2. Control-click (or right-click) anywhere inside the list of printers on the right.

  3. Select Reset Printing System… from the contextual menu.

  4. Confirm by clicking Reset when prompted and enter your Mac administrator password.

  5. Once complete, restart your Mac.

  6. Re-open Printers & Scanners, click Add Printer, Scanner, or Fax…, and re-add your wireless printer.

Step 5: Remove Corrupted Driver Files & Reinstall AirPrint Drivers

If legacy printer software is conflicting with the updated operating system, you must delete the corrupt software folders prior to reinstalling fresh drivers:

  1. Open Finder, click Go in the top menu bar, and select Go to Folder…

  2. Type /Library/Printers/ and press Enter.

  3. Locate the folder matching your printer brand (e.g., HP, Epson, Canon, Brother) and move it to the Trash.

  4. Empty your Trash and Restart your Mac.

  5. Visit the official manufacturer support page for your printer model and download the latest software suite compatible with your new macOS version.

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Frequently Asked Questions (FAQ)

Why is my Mac printer showing “Offline” even though it is connected to Wi-Fi?

A printer usually displays “Offline” when macOS loses track of its IP address due to network IP changes, local network permission blocks, or print spooler glitches following a software update.

Do I need special drivers for AirPrint printers on macOS?

No. AirPrint-compatible printers do not require third-party driver downloads to perform basic printing. However, if automatic AirPrint discovery fails after an update, resetting the print system or re-adding the printer via IP address usually fixes the problem.

Will resetting the printing system delete my scanned documents?

No. Resetting the printing system only removes printer and scanner configurations and print queue data from your Mac system settings. None of your personal files, saved PDFs, or photos will be affected.