Mirroring an image on a Mac is a quick way to flip photos for design projects, social media, or personal preference. Whether you are preparing a portfolio or correcting composition, the process is simple and built into most native and third party apps.
These steps cover the default Preview app, Apple Photos, and common editors so you can apply the same mirror image workflow across your entire workflow.
| Method | App | When to Use | Undo Support |
|---|---|---|---|
| Flip Horizontal | Preview, Photos, most editors | Standard mirroring left to right | Yes, Command-Z |
| Flip Vertical | Preview, Photos, Affinity, Photoshop | Mirror along top and bottom | Yes, Command-Z |
| Rotate 180° | Preview, Photos | Reverses top and bottom as well as left and right | Yes, Command-Z |
| Layer Transform | Photoshop, GIMP, Pixelmator Pro | Non destructive editing and precise control | History panel or undo stack |
Flip Horizontally in Preview
Open Image and Access Tools
Right click the photo and choose Open With Preview, or double click to launch it by default. From the menu bar, select Tools and then Show Edit Toolbar to reveal the flip options.
Use the Flip Button
Click the curved arrow icon labeled Flip Horizontal in the edit toolbar. The image instantly mirrors along the vertical axis, preserving the original dimensions and layout.
Flip Horizontally in Apple Photos
Enter Edit Mode and Adjust
Double click a photo in your library, then click Edit in the top right corner. Move your cursor over the image to reveal adjustment tools, and choose the Crop tool to access flip actions.
Apply the Flip
Tap the Rotate button until you see Flip Horizontal, or click it directly. Confirm the change and click Done to save, or Revert to remove all adjustments.
Advanced Options in Third Party Editors
Photoshop and Affinity Photo
Choose Image or Layer, then Transform and Flip Horizontal. These editors let you mirror specific selections, apply guides, and control anchor points for more creative control.
Pixelmator Pro and Skia
Use the Enlarge tool or Transform handles to mirror content freely. Layer based workflows allow non destructive edits so you can revisit or adjust the flip later.
Key Takeaways for Consistent Results
- Preview and Photos support quick flip horizontal with built in Undo.
- Choose Flip Horizontal to mirror along the vertical axis, not Rotatate 180°.
- Use layer based editors for non destructive edits and precise control.
- Text and fine graphics may need manual recomposing after mirroring.
- Save a duplicate version if you want to preserve the original orientation.
FAQ
Reader questions
Will mirroring an image change the file size?
No, flipping horizontally or vertically does not noticeably change the file size, because the pixel dimensions stay the same.
Can I mirror only part of a photo on Mac?
Yes, select the area, copy it to a new layer, then flip that layer horizontally while keeping the rest of the image unchanged.
Why does my mirrored image look backwards with text?
Text and icons are directional, so a horizontal flip reverses their order. Re‑write or re‑orient the text on the correct side after mirroring.
Can I batch mirror multiple images on macOS?
Use Automator or a script with Preview, or a third party app to apply flip horizontal in batch across a folder of photos.