# \[Solved\] iScreensaver is blocked by my Mac

**URL:** <https://forum.iscreensaver.com/t/solved-iscreensaver-is-blocked-by-my-mac/382>\
**Category:** iScreensaver 4 Personal for Mac\
**Created:** [February 27, 2018, 9:07am UTC](https://forum.iscreensaver.com/t/solved-iscreensaver-is-blocked-by-my-mac/382 "2018-02-27T09:07:30Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Estari](https://forum.iscreensaver.com/letter_avatar_proxy/v4/letter/e/f19dbf/32.png) [@Estari](https://forum.iscreensaver.com/u/Estari)\
**Post date:** [February 27, 2018, 9:07am UTC](https://forum.iscreensaver.com/t/solved-iscreensaver-is-blocked-by-my-mac/382/1 "2018-02-27T09:07:30Z")

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Hi, thought I’d join so I can learn how to make video screensaver. My first time trying. I was not able to open iscreensaver for Mountain Lion which is the system we have on my Mom’s computer. It didn’t trust the app because it was downloaded from the site. Is there a way to fix this problem? I really want to try out making a screensaver as soon as I can.

Any help is appreciated,  
Thanks  
-Estari

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**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:** [February 27, 2018, 5:51pm UTC](https://forum.iscreensaver.com/t/solved-iscreensaver-is-blocked-by-my-mac/382/2 "2018-02-27T17:51:04Z")

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For Mountain Lion (10.8) you’d have to use our older software - please try iScreensaver Designer 4.5.

Also, if you are getting the GateKeeper warning about unsigned software, but you do trust the source of the screensaver, you can simply Right-click on the screensaver installer icon and choose “Open”.

See instructions here:  
[https://iscreensaver.com/help/notes/code\_signing/code\_signing.shtml#bypassWarning](https://iscreensaver.com/help/notes/code_signing/code_signing.shtml#bypassWarning)

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**Author:** ![Estari](https://forum.iscreensaver.com/letter_avatar_proxy/v4/letter/e/f19dbf/32.png) [@Estari](https://forum.iscreensaver.com/u/Estari)\
**Post date:** [March 1, 2018, 11:03am UTC](https://forum.iscreensaver.com/t/solved-iscreensaver-is-blocked-by-my-mac/382/3 "2018-03-01T11:03:20Z")

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Thank you so much! I shall try that!