# I can't start UE 4.20.1, the platform gets close

**URL:** <https://forums.unrealengine.com/t/i-cant-start-ue-4-20-1-the-platform-gets-close/430438>\
**Category:** Platform & Builds\
**Tags:** not-starting, unreal-engine, question\
**Created:** [July 28, 2018, 7:49am UTC](https://forums.unrealengine.com/t/i-cant-start-ue-4-20-1-the-platform-gets-close/430438 "2018-07-28T07:49:14Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![haritziker141](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@haritziker141](https://forums.unrealengine.com/u/haritziker141)\
**Post date:** [July 28, 2018, 7:49am UTC](https://forums.unrealengine.com/t/i-cant-start-ue-4-20-1-the-platform-gets-close/430438/1 "2018-07-28T07:49:14Z")

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I have been able to install the UE 4.20.1 but when I try to start it, the platform gets close. Is there any problem with my Mac Os version? It is a MacOs Sierra 10.12.6. May I download a previous version of UE 4 that is compatible with this version of MacOs?

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**Author:** ![FusionAura](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@FusionAura](https://forums.unrealengine.com/u/FusionAura)\
**Post date:** [July 28, 2018, 10:22am UTC](https://forums.unrealengine.com/t/i-cant-start-ue-4-20-1-the-platform-gets-close/430438/2 "2018-07-28T10:22:43Z")

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What are your specs? Do they meet these requirements?

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Have you tried re-verifying version 19 to make sure it was installed correctly?