RBW30 Latest Firmware file corrupt

RBW30 finally updated in the app on my IOS, took a lot of attempts and the funny thing was not trying when it updated.  Still not updating on the RBR40

> Having the same issue with the download [...]

   Perhaps you are, and perhaps you're not, but starting your own new
thread for your own problem is usually a better idea than joining an old
thread which has been marked as "Solved".

> [...] on my imac the file shows up as "Adobe"icon [...]

   I can't explain that, but I'd guess that some Adobe program also uses
the file type ".chk" for some (other) purpose.  Why do you care about
the icon?

> [...] am unable to get the zip file for the Satellite RBW30.

   "unable" is not a useful problem description.  It does not say what
you did.  It does not say what happened when you did it.  As usual,
showing actual actions (commands) with their actual results (error
messages, LED indicators, ...) can be more helpful than vague
descriptions or interpretations.

> [...] The same goes for RBR40 getting the dmg file and it will not
> open.

   _Which_ "the dmg file"?  Regarding "will not", see "unable", above.

   First, on my Mac, I see nothing obviously wrong with the various
relevant firmware kits:

$ ls -l RB*.zip
-rw-rw-rw-@ 1 sms  staff  33931424 Nov  1 15:42 RBR40-V2.6.1.36.zip
-rw-rw-rw-@ 1 sms  staff  23010129 Nov  1 15:42 RBS40-V2.6.1.38.zip
-rw-rw-rw-@ 1 sms  staff  19382029 Nov  1 15:39 RBW30-V2.6.1.6_1.0.13.zip

$ unzip -l RBR40-V2.6.1.36.zip
Archive:  RBR40-V2.6.1.36.zip
  Length      Date    Time    Name
---------  ---------- -----   ----
 34343041  09-10-2020 22:41   RBR40-V2.6.1.36.img
      982  10-07-2020 01:00   RBR40-V2.6.1.36_Release_Notes.html
---------                     -------
 34344023                     2 files

$ unzip -l RBS40-V2.6.1.38.zip
Archive:  RBS40-V2.6.1.38.zip
  Length      Date    Time    Name
---------  ---------- -----   ----
 23462017  09-16-2020 20:15   RBS40-V2.6.1.38.img
      982  10-07-2020 01:34   RBS40-V2.6.1.38_Release_Notes.html
---------                     -------
 23462999                     2 files

$ unzip -l RBW30-V2.6.1.6_1.0.13.zip
Archive:  RBW30-V2.6.1.6_1.0.13.zip
  Length      Date    Time    Name
---------  ---------- -----   ----
 20851578  10-19-2020 00:49   RBW30-V2.6.1.6_1.0.13.chk
      880  10-19-2020 01:09   RBW30-V2.6.1.6_1.0.13_Release_Notes.html
---------                     -------
 20852458                     2 files

And I see no "the dmg file".

   As for "will not open", see:

      https://community.netgear.com/t5/x/x/m-p/1721037#M124018

> [...] it's always the problems in trying to update.

   Reading the documentation, and following the instructions therein,
might help with that.

   If the firmware Release Notes lack helpful instructions, then visit
http://netgear.com/support , put in your model number, and look for
Documentation.  Get the User Manual.  Read.  Look for "firmware", and,
especially, for a topic like "Manually Upload Firmware to the Router".

   Or:

      https://kb.netgear.com/23960
      https://kb.netgear.com/31573

> [...] I'm not able to upload the .chk file. The GUI says the firmware
> must be an .img file.

   Did you read any of the material above in this old thread which you
have (inappropriately) joined?  Which part of the following was
unclear?:

      [...] starting your own new thread for your own problem is usually
      a better idea than joining an old thread which has been marked as
      "Solved".

   And which part of the paragraph which began as follows was unclear?:

      "unable" is not a useful problem description. [...]

   _Which_ "the .chk file"?  To what were you trying to upload it?