# Instalation package doesn't open on old Mac

**URL:** <https://forum.anaconda.com/t/instalation-package-doesnt-open-on-old-mac/50455>\
**Category:** Product Help\
**Created:** [February 9, 2023, 9:31am UTC](https://forum.anaconda.com/t/instalation-package-doesnt-open-on-old-mac/50455 "2023-02-09T09:31:31Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![ostepnik](https://avatars.discourse-cdn.com/v4/letter/o/00a5b5/32.png) [@ostepnik](https://forum.anaconda.com/u/ostepnik)\
**Post date:** [February 9, 2023, 9:31am UTC](https://forum.anaconda.com/t/instalation-package-doesnt-open-on-old-mac/50455/1 "2023-02-09T09:31:31Z")

</div>

Hello, please help me, I’m stuck!

I have an old Mac from early 2015 (3.1 GHz Dual-Core Intel Core i7, 16Gb 1867 Mhz DDR3). The operational system is macOS Monterey.

I tried installing Anaconda3, but the installation failed before it even ended. I found a similar case here and the person was advised to install Anaconda2.

I went ahead to do it but even before the installation launched I received a message:

“Anaconda2-2.4.1-MacOSX-x86\_64.pkg” can’t be opened because Apple cannot check it for malicious software.  
This software needs to be updated. Contact the developer for more information.

I would appreciate any suggestions. I am starting a course and my mentor is unavailable for the next week.