# IO Exception Error when building Mac Screensaver

**URL:** <https://forum.iscreensaver.com/t/io-exception-error-when-building-mac-screensaver/677>\
**Category:** macOS\
**Created:** [October 12, 2022, 11:38am UTC](https://forum.iscreensaver.com/t/io-exception-error-when-building-mac-screensaver/677 "2022-10-12T11:38:53Z")\
**Posts on this page:** 1\
**Showing post:** 4

<div class="post-metadata">

**Author:** ![iScreensaver](https://forum.iscreensaver.com/user_avatar/forum.iscreensaver.com/iscreensaver/32/24_2.png) [@iScreensaver](https://forum.iscreensaver.com/u/iScreensaver)\
**Post date:** [November 3, 2023, 4:59pm UTC](https://forum.iscreensaver.com/t/io-exception-error-when-building-mac-screensaver/677/4 "2023-11-03T16:59:32Z")

</div>

If you are adding specific exceptions for `iScreensaver Designer.app` to your antivirus software, please take note:

During build, iScreensaver builds to a temporary folder, and then copies the built installer app to the destination folder (the `/Installers/mac` or `/Installer/win` folders which are located next to the ISC project file.

On macOS the temp folder has a long random name.  
If you look at the build details, you will see the folder listed toward the end. It will look like this:

```auto
----------------------------------------
Adding Module JSON
----------------------------------------
----------------------------------------
Saving Archive
Saving Copy to : /private/var/folders/1w/bjsh07hj1g3_7x6x4m064ryw0000gq/T/TemporaryItems/iScreensaver Temp/Temp-77300306/Install SpaceDemo Saver.app/Contents/Resources/Archive/Archive.isc

```

An easy way to find this temporary folder is to use the Terminal and type this command:

> open “$TMPDIR/TemporaryItems/iScreensaver Temp”

Which will open the folder in the Finder.

Then you can add this folder to your antivirus exceptions list.

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