# Unable to open Slicer package on Mac
**URL:** https://discourse.slicer.org/t/unable-to-open-slicer-package-on-mac/932
**Category:** Support
**Tags:** package
**Created:** [August 23, 2017, 5:35pm UTC](https://discourse.slicer.org/t/unable-to-open-slicer-package-on-mac/932 "2017-08-23T17:35:47Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@fedorov](https://discourse.slicer.org/u/fedorov)
#### Post date: [August 23, 2017, 5:35pm UTC](https://discourse.slicer.org/t/unable-to-open-slicer-package-on-mac/932/1 "2017-08-23T17:35:47Z")
I downloaded today’s nightly package, but when I click on the .dmg file, nothing happens - the volume is not mounted.
I searched around, and the only reason I can see is that download was corrupted in the process. I computed the checksum, and it matches 7b265f06b75b83e763f5e25537fc0a8a listed on [http://slicer.kitware.com/midas3/api/rest?method=midas.bitstream.download&name=Slicer-4.7.0-2017-08-22-macosx-amd64.dmg&checksum=7b265f06b75b83e763f5e25537fc0a8a](http://slicer.kitware.com/midas3/api/rest?method=midas.bitstream.download&name=Slicer-4.7.0-2017-08-22-macosx-amd64.dmg&checksum=7b265f06b75b83e763f5e25537fc0a8a).
Anyone has any hints what could be causing this, or how to debug this issue?
Anyone experienced a similar problem on mac?
---
### Author:  [@fedorov](https://discourse.slicer.org/u/fedorov)
#### Post date: [August 23, 2017, 5:46pm UTC](https://discourse.slicer.org/t/unable-to-open-slicer-package-on-mac/932/2 "2017-08-23T17:46:34Z")
I was able to “resolve” this problem by downloading Slicer package 3 times. I was able to mount “the 3rd dmg file”. md5 checksum is the same in the last 2 of the downloaded dmg files.
---
### Author:  [@lassoan](https://discourse.slicer.org/u/lassoan)
#### Post date: [August 23, 2017, 9:37pm UTC](https://discourse.slicer.org/t/unable-to-open-slicer-package-on-mac/932/3 "2017-08-23T21:37:10Z")
2 posts were split to a new topic: [Slicer installation on Mac using homebrew](https://discourse.slicer.org/t/slicer-installation-on-mac-using-homebrew/933)
---
### Author:  [@lassoan](https://discourse.slicer.org/u/lassoan)
#### Post date: [August 23, 2017, 9:38pm UTC](https://discourse.slicer.org/t/unable-to-open-slicer-package-on-mac/932/5 "2017-08-23T21:38:29Z")
9 posts were merged into an existing topic: [Slicer installation on Mac using homebrew](https://discourse.slicer.org/t/slicer-installation-on-mac-using-homebrew/933)