1. **Safari**:
- Open Safari.
- Go to Safari > Preferences in the menu bar.
- Click on the "Websites" tab.
- In the left sidebar, select "Pop-up Windows."
- You can then choose to allow pop-ups for all websites, or you can add specific websites to the list of exceptions.
2. **Google Chrome**:
- Open Chrome.
- Click on the three-dot menu icon in the top right corner.
- Select "Settings."
- Scroll down and click on "Advanced."
- Under "Privacy and security," click on "Site settings."
- Scroll down and click on "Pop-ups and redirects."
- Toggle the switch to allow pop-ups.
3. **Mozilla Firefox**:
- Open Firefox.
- Click on the three-line menu icon in the top right corner.
- Select "Preferences."
- Click on "Privacy & Security" on the left sidebar.
- Scroll down to the "Permissions" section.
- Next to "Block pop-up windows," click on "Exceptions."
- Add the websites you want to allow pop-ups from and click "Save Changes."
4. **Opera**:
- Open Opera.
- Click on the Opera menu icon in the top left corner.
- Select "Settings."
- Scroll down and click on "Advanced" in the left sidebar.
- Under "Privacy & security," click on "Site settings."
- Scroll down and click on "Pop-ups and redirects."
- Toggle the switch to allow pop-ups.
These instructions should help you enable pop-ups on your Mac for the most commonly used browsers. Keep in mind that allowing pop-ups can sometimes lead to unwanted advertisements or security risks, so be cautious about which websites you allow to show pop-ups.