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Installation guide: Mention slow first launch time #253

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7 changes: 7 additions & 0 deletions docs/tutorials/fundamentals/installation.md
Original file line number Diff line number Diff line change
Expand Up @@ -170,6 +170,13 @@ the current release {{ napari_version }}, using command: `napari --version` .
````
![macOS desktop with a napari viewer window without any image opened in the foreground, and a terminal in the background with the appropriate conda environment activated (if applicable) and the command to open napari entered.](../assets/tutorials/launch_cli_empty.png)

````{note}
On some platforms, particularly macOS and Windows, there may be a ~30 second
delay before the viewer appears on first launch. This is expected and subsequent
launches should be quick. However, anti-malware and other security software
measures may further delay launches—even after the first launch.
````

## Choosing a different Qt backend

napari needs a library called [Qt](https://www.qt.io/) to run its user interface
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