# SWF and Mac os X

**URL:** https://forum.kirupa.com/t/swf-and-mac-os-x/152002
**Category:** flash
**Created:** [June 20, 2005, 1:59pm UTC](https://forum.kirupa.com/t/swf-and-mac-os-x/152002 "2005-06-20T13:59:07Z")
**Posts on this page:** 1
**Page:** 1

<div class="post-metadata">

### Author: ![dfirming](https://avatars.discourse-cdn.com/v4/letter/d/dec6dc/32.png) [@dfirming](https://forum.kirupa.com/u/dfirming)
#### Post date: [June 20, 2005, 1:59pm UTC](https://forum.kirupa.com/t/swf-and-mac-os-x/152002/1 "2005-06-20T13:59:07Z")

</div>

Hello,  
I have a swf with a basic photo slideshow using motion tweens. My swf plays fine on a PC. On a Mac the transitions (fade using alpha and motion tweens) look jumpy. It runs OK with the smaller photos, but look really bad with the larger ones.

I was told that I had to optimize the frame rate for Mac which prefers something other that 12fps. but I am not sure its this. Any suggestions.

thanks,  
dF