# macOS Tahoe Changed Your Screenshot Format to HEIC: How to Fix It www.lazyscreenshots.com publishes a public search API over its indexed pages; the guide is at https://www.lazyscreenshots.com/agent-access. Source: https://www.lazyscreenshots.com/blog/macos-tahoe-screenshot-heic-hdr-fix/ Source observed: 2026-09-19T03:00:33.072Z Last checked: 2026-09-19T17:04:19.455+00:00 Indexed: 2026-09-19T03:06:29.878+00:00 --- # macOS Tahoe Changed Your Screenshot Format to HEIC: How to Fix It **April 26, 2026 · LazyScreenshots Team** ## Your screenshots are suddenly HEIC — here's why After updating to macOS Tahoe, a screenshot may save with a `.heic` extension instead of `.png`. This can cause problems when uploading to GitHub, Jira, Slack, web applications, or AI coding tools. macOS Tahoe (macOS 26) deliberately defaults to HEIC with HDR tone mapping on Macs with HDR-capable displays, including every MacBook Pro with a Liquid Retina XDR screen, the Pro Display XDR, and the Studio Display. HEIC preserves HDR color range and Extended Dynamic Range data that PNG cannot represent, so the capture more closely reflects the display. Compatibility is the tradeoff. ## How to switch back to PNG in macOS Tahoe The Terminal method is described as more reliable across reboots and updates. ### Method 1: Screenshot app settings 1. Open the Screenshot toolbar with **Cmd+Shift+5**. 2. Click **Options**. 3. Under **Format**, select **PNG** instead of HEIC. 4. Close the toolbar. New screenshots will save as PNG. The setting may revert after a system update or restart; if it does, use Method 2. ### Method 2: Terminal command (recommended) Open Terminal and run: ```sh defaults write com.apple.screencapture type png killall SystemUIServer ``` The `killall SystemUIServer` command restarts the screenshot service so the change takes effect immediately. Verify the format with: ```sh defaults read com.apple.screencapture type ``` The output should be `png`. If it still shows `heic`, log out and back in. ### Method 3: Keep PNG as the default and capture HDR in HEIC on demand Set PNG as the default with the command above, then use a Shortcut or Automator workflow to run: ```sh screencapture -t heic -i ~/Desktop/hdr-screenshot.heic ``` This keeps PNG for daily developer work while allowing HEIC captures when color accuracy matters. ## What about JPG? Set JPG with: ```sh defaults write com.apple.screencapture type jpg killall SystemUIServer ``` JPG files are smaller than PNG but use lossy compression. On code, terminal output, and UI elements, JPG can create artifacts around sharp edges. PNG is lossless and preserves each pixel, making it the preferred choice for most developer workflows. PNG screenshots are typically **200KB–2MB**. HEIC is often **50–70% of the PNG size**, but its compatibility tradeoff can be significant. If you need smaller files, compress PNGs after capture with ImageOptim or `sips` rather than switching to a format that many tools cannot open. ## Which apps and services don't support HEIC? The following compatibility information applies **as of early 2026**: | App / Service | HEIC Support | Notes | | --- | --- | --- | | GitHub Issues & PRs | No | Upload rejected; convert to PNG/JPG first | | GitLab Issues | No | HEIC is not in allowed formats; convert first | | Jira | Partial | Uploads but has no inline preview; downloads as an attachment | | Slack | Partial | Desktop app renders inline; web app may not preview | | Notion | Yes | Full support with inline rendering | | Linear | No | Upload fails; convert to PNG first | | Claude / ChatGPT | Yes | AI models accept HEIC, but some UI upload fields reject it | | Cursor | Partial | Chat accepts it; some inline features may not preview | | Windows viewers | Partial | Windows 10+ supports HEIC with a codec installation; it is not the default | | WordPress | No | Media library rejects HEIC uploads by default | Apple's ecosystem handles HEIC well, while support elsewhere varies. If your workflow touches GitHub, Jira, Linear, or WordPress, PNG is the safer default. ## How to batch-convert existing HEIC screenshots ### Using Preview 1. Select the HEIC files in Finder. 2. Right-click and choose **Open With > Preview**. 3. In Preview, select all images in the sidebar with **Cmd+A**. 4. Choose **File > Export Selected Images**. 5. Select PNG, choose a destination folder, and click **Choose**. ### Using `sips` in Terminal Navigate to the folder containing the screenshots and run: ```sh for f in *.heic; do sips -s format png "$f" --out "${f%.heic}.png"; done ``` This converts every `.heic` file in the current directory to PNG. The originals remain in place, and new `.png` files are created alongside them. ### Using Automator for a right-click Quick Action 1. Open Automator and create a new Quick Action. 2. Configure it to receive **image files** in **Finder**. 3. Add **Change Type of Images** and set the type to PNG. 4. Save it as **Convert to PNG**. 5. In Finder, right-click a HEIC file and choose **Quick Actions > Convert to PNG**. ## When HEIC screenshots make sense **Design work on HDR displays:** On a Liquid Retina XDR display, HEIC preserves the full color range for HDR gradients, P3 color-gamut checks, and HDR video thumbnails. Converting to PNG clips HDR data to SDR and loses extended brightness and color information. **Storage-constrained workflows:** HEIC files are typically **40–60% smaller** than equivalent PNGs. This can help when capturing hundreds of screenshots for test automation or monitoring, provided the pipeline supports HEIC. **Apple-only sharing:** HEIC works smoothly when screenshots go only to Mac and iOS users through iMessage, AirDrop, or Apple Notes. Apple's ecosystem has supported HEIC since 2017. For cross-platform sharing, web uploads, and AI coding assistants, PNG remains the broadly compatible choice without conversion. ## Prevent this from happening again after updates Apple may reset screenshot preferences during major macOS updates. Save the following as `fix-screenshots.sh`, make it executable with `chmod +x fix-screenshots.sh`, and run it after an update: ```bash #!/bin/bash defaults write com.apple.screencapture type png defaults write com.apple.screencapture disable-shadow -bool true defaults write com.apple.screencapture show-thumbnail -bool false killall SystemUIServer echo "Screenshot preferences restored." ``` You can also add the script to a dotfiles repository as part of your standard machine setup. LazyScreenshots saves in the right format and auto-pastes into Claude, Cursor, and ChatGPT. It is available for **$29 one-time**. [Try LazyScreenshots — $29 one-time](https://www.lazyscreenshots.com/) ## Related - [How to Change Screenshot Format on Mac (PNG, JPG, HEIC, PDF)](https://www.lazyscreenshots.com/blog/change-screenshot-format-mac-png-jpg-heic/) - [Mac Screenshot Settings: How to Change Save Location, Format, and File Name](https://www.lazyscreenshots.com/blog/mac-screenshot-settings-location-format/) --- ## Ask www.lazyscreenshots.com about this page Public sources, cited, no account or API key. Replace each {slot} with the user's actual words, URL-encoded. Write an unknown as the literal null (company=null) and a list as JSON (alternatives=["Snagit"]). 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