How do I force quit Preview app on my Mac?

Preview doesn't close when you close the documents. You can quit in the following ways:

With the Preview menu bar still showing hit cmd-q or click on "Preview" and hit Quit Preview

Right-click on Preview in the dock and hit Quit

cmd-option-esc then select Preview and force quit.

Just to add, applications that can only have one window open at a time may quit when you click the red close button. It's best to press Command+Q or chose "Quit <app's name>" from an application's menu. Then you don't have to remember which ones will quit and which don't.

Hello michalmcode,

The Preview app will quit automatically when you select another application (or application window). You could also use the keyboard shortcut command + Q to quit the app.

Just to add, Preview does not quit if you just close the window.

There are some Apple applications that Do Totally Quit when using the Red - Orange - Green buttons on top Left of the application window.

Reminder, Contacts, Photos and some others Do Quit Totally

Though, Mail, Safari, Preview, Messages Calendar and others Do Not

If you use the Dock

If you look very closely at say Preview in the Dock

You would see

Both the icon of Preview appearing in the dock AND a small Black Dot beneath it

Meaning, the application is still running even if the Preview Window is closed

An aside to this issue

" I am using OS version: 15.3.1 (24D70) "

As of Tuesday March 11 there is an update available which is suggested to be installed

Version 15.3.2 of Sequoia

About the security content of macOS Sequoia 15.3.2

Always make a Time Machine Backup  before doing any upDates

It maybe the only way back if something should go awry

PRP_53 wrote:

An aside to this issue

" I am using OS version: 15.3.1 (24D70) "

As of Tuesday March 11 there is an update available which is suggested to be installed

Version 15.3.2 of Sequoia

About the security content of macOS Sequoia 15.3.2

Always make a Time Machine Backup  before doing any upDates

It maybe the only way back if something should go awry

This doesn't answer the OP's question which is not a problem related to the version of OS.

If you believe that withholding this information is inappropriate

We, as Responsible Individuals may have certain information which may not be known by OP

By all means, pursue this through the appropriate channels

michalmcode wrote:

I think it was, similar to the Reminders App

No.

Zurarczurx wrote:

This doesn't answer the OP's question which is not a problem related to the version of OS.

It wasn't meant to.