Mac App Store スクリーンショットのサイズと要件一覧 (2026年版)
If you ship a Mac app, the App Store needs a separate set of screenshots from your iPhone and iPad assets — at Mac-specific sizes and a wider 16:10 aspect ratio. This reference lists the accepted Mac App Store screenshot sizes for 2026 and the rules that trip people up.
Sizes were checked against Apple's documentation on June 18, 2026. Confirm against the current screenshot specifications before uploading.
Mac App Store Screenshot Sizes
| Size | Aspect ratio | Notes |
|---|---|---|
| 1280 × 800 px | 16:10 | Smallest accepted Mac screenshot size. |
| 1440 × 900 px | 16:10 | Common MacBook Air-class size. |
| 2560 × 1600 px | 16:10 | Retina equivalent of 1280 × 800. |
| 2880 × 1800 px | 16:10 | Retina equivalent of 1440 × 900; the safest high-res choice. |
All four sizes share the same 16:10 shape, so you can design once and export the largest size. Upload 2880 × 1800 unless you have a specific reason to use a smaller asset.
How Mac Screenshots Differ from iPhone and iPad
- Aspect ratio: Mac is landscape 16:10, not the tall portrait shape of iPhone screenshots.
- Separate asset set: Mac screenshots live in their own slots in App Store Connect; they are not generated from iOS assets.
- Window-based: Mac apps are windows, so screenshots usually show the app window — optionally on a backdrop — rather than a full-bleed device screen.
Design and Upload Tips
- Capture the real macOS window at full Retina resolution, then place it on a clean background sized to 2880 × 1800.
- Keep captions short and high-contrast; landscape gives you horizontal room iPhone screenshots do not have.
- Flatten to RGB PNG or JPEG with no alpha before uploading.
- Lead with the core workflow in the first one or two screenshots, just like iOS.
関連するASOガイド
- App Store screenshot sizes: the full size table for iPhone and iPad alongside Mac.
- iPhone and iPad screenshots: what to upload for the mobile side of your listing.
- Upload to App Store Connect: the same upload flow handles Mac screenshots.
よくある質問
What size are Mac App Store screenshots?
Mac App Store screenshots use a 16:10 aspect ratio at one of four accepted sizes: 1280 × 800, 1440 × 900, 2560 × 1600, or 2880 × 1800 pixels. Most developers upload 2880 × 1800 for the sharpest result on Retina displays.
How many Mac screenshots can I upload?
You can upload up to 10 screenshots for a Mac app, and you need at least one. As with iOS, the first few do most of the conversion work.
Do Mac screenshots need to be the actual app window?
Apple expects Mac screenshots to show your app's real interface. You can place the window on a background and add captions, but the screenshot must represent the actual macOS app, not an iOS build or a marketing illustration.
Can Mac screenshots have transparency?
No. Like other App Store screenshots, Mac screenshots should be flattened RGB images (PNG or JPEG) with no alpha channel. Flatten any framed composition onto a solid or gradient background before uploading.