# Tweens jerky on some machines, fine on my Mac

**URL:** https://forum.kirupa.com/t/tweens-jerky-on-some-machines-fine-on-my-mac/158375
**Category:** Uncategorized
**Created:** [August 9, 2005, 12:04pm UTC](https://forum.kirupa.com/t/tweens-jerky-on-some-machines-fine-on-my-mac/158375 "2005-08-09T12:04:40Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![veraxoxo](https://avatars.discourse-cdn.com/v4/letter/v/f19dbf/32.png) [@veraxoxo](https://forum.kirupa.com/u/veraxoxo)
#### Post date: [August 9, 2005, 12:04pm UTC](https://forum.kirupa.com/t/tweens-jerky-on-some-machines-fine-on-my-mac/158375/1 "2005-08-09T12:04:40Z")

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My Flash application uses 30 fps speed and was created on a Mac. I am using both traditional tweening and the tween class. However, when I run the website on some machines ( a laptop, or workstation) the tweens become horribly slow and choppy and transparent objects show a “shadow”. But when I run it on my Mac (same speed and bandwidth), it runs fine.

Anyone had a similar experience or have any ideas what could be the problem?