File Upload Dialog Sheet Vertically Collapsed into Ultra-Thin Bar in Google Chrome

Device: macbook air

When clicking "Attach Files" inside webmail (Gmail) using Google Chrome, the macOS system open/file picker dialog opens in a corrupted state. Instead of presenting a standard window, it displays as an extremely narrow, paper-thin horizontal strip across the screen, making file selection impossible.

Could someone please advise on how to fix or reset this issue? Thank you in advance

Posted on Oct 4, 2026 2:28 AM

1 reply

WheelieNick

Level 9 (74,110 points)

Oct 10, 2026 12:52 AM in response to ash_90

Hi there

For a solution without using the terminal and having advanced computer knowledge, have you tried this?

Go to your Mac's System Settings > Displays.
Temporarily switch your resolution to More Space (the highest scaling setting). This shrinks everything on your screen and will often reveal the hidden edges or corners of the ultra-thin window.
Click "Attach Files" in Gmail to bring up the thin bar.
Hover your mouse carefully over the very top or bottom edge of the paper-thin bar until your cursor changes into a vertical resizing double-arrow.
Click and drag aggressively up or down to expand the window back to a normal size.
Once restored, you can change your display resolution back to default.