Fix Acrobat Installer Error: Safari Must Be Closed on macOS
Question details
The user is unable to install Adobe Acrobat on macOS because the installer repeatedly prompts that Safari must be closed, even though no Safari windows are visible on the screen.
- Product
- Adobe Acrobat
- Device & OS
- macOS
- Scenario
- Installing Adobe Acrobat on an Apple Mac computer
- Observed behavior
- The Acrobat installer pauses and throws an error message demanding that Safari be closed, preventing the installation process from completing, despite Safari appearing fully closed to the user.
Before forcefully closing applications, ensure you have saved any ongoing work in your browsers and verify that you have administrative privileges on your Mac to install new software.
Force Quit Safari via Activity Monitor
Use the built-in macOS Activity Monitor to identify and terminate hidden Safari background processes that are blocking the Adobe installer.
Even when you close all Safari windows, background processes for syncing, caching, or web extensions often remain active in macOS memory. The Acrobat installer detects these hidden processes and interprets them as an open Safari application.
Press Cmd + Space to open Spotlight Search, type 'Activity Monitor', and press Enter to launch the utility.
Click the search bar in the top-right corner of the Activity Monitor window and type 'Safari'.
Highlight any processes named Safari (including SafariNetworking or Safari Web Content), click the 'X' button at the top of the window, and choose 'Force Quit'.
Switch back to the Adobe Acrobat installer window and click 'Continue' or restart the installer to proceed.
Restart Mac and Check for System Updates
A simple system reboot can automatically clear stubborn background processes, while macOS updates ensure installer compatibility.
Use WPS Office as a Lightweight PDF Editor
Skip heavy installations and background process conflicts. WPS Office features a powerful, built-in PDF editor that installs seamlessly on macOS, letting you handle all your document viewing, editing, and conversion needs instantly.
- 1. Download the Installer: Get the official WPS Office package for macOS directly from the WPS website.
- 2. Run the Setup: Open the lightweight installer package. It requires minimal system resources and installs in seconds without demanding browser shutdowns.
- 3. Edit Your PDFs: Launch WPS Office, select the 'PDF' tab, and drag your file in to start viewing, editing, or converting immediately.
Frequently Asked Questions
Why does the Acrobat installer think Safari is open when there are no visible windows?
Safari often keeps background processes running for system notifications, iCloud syncing, or caching even when the main browser window is closed. The Adobe Acrobat installer detects these background operations and pauses the installation until they are completely terminated.
Can I install Adobe Acrobat without closing my web browsers?
Typically, no. The Acrobat installer often integrates browser extensions and plugins for web-to-PDF conversions. To successfully modify browser files, it requires the target browsers (like Safari or Chrome) to be completely shut down during the setup process.
What if Force Quitting Safari in Activity Monitor doesn't work?
If Force Quitting the processes doesn't resolve the error, completely restart your Mac. When the confirmation prompt appears, ensure that the 'Reopen windows when logging back in' box is unchecked so Safari doesn't automatically launch upon restart.
Does WPS Office require me to close Safari during installation on macOS?
No. WPS Office has a highly streamlined installation architecture on macOS that does not require you to close Safari, Chrome, or any other applications to successfully complete the setup process.
