OK. I figured out a round about solution to open .docm files that works for me most of the time.
Things that you will need: Google Drive (iOS app) and Pages (iOS app) or QuickOffice (iOS app)
Note: you will also need to have a Google acount (Gmail acount) to use Google Drive app.
Step 1:
Navigate to the .docm file on your iPad (either in Mail, Safari, Chrome, etc)
Step 2:
When you click to open the file, you then get a '(OfficeImportErrorDomain error 912.)' Error.
Step 3:
Tap neat the above error text to get the 'Open In' Button, then click on it.
Step 4:
Select 'Open in Google Drive' option
Step 5:
Google Drive will ask you if you want to upload the document to Google Drive. Select 'Upload'
Step 6:
Once uploaded to Google Drive, touch the 'i' icon (I guess it stands for 'infor') on the right side of the screen that is assosiated with that particular document.
Step 7:
From the documents 'Details' view, click on the name of the document and edit the file extension form '.docm' to '.doc'
Step 8:
Confirm that you wish to rename the file.
Step 9:
You should now be back in the file view of the Google Drive app. Now tap on the file that you just renamed to the '.doc' file extension. YOU WILL GET AN ERROR, stating 'Unable to open file type, this file type is not supported'. Below this, you will also have the option to 'Try opening this item in another app; Open in... ' - Select 'Open in..."
Step 10:
From the options of apps, select "Pages". This will upload the file to Pages and now you will be able to view your document!!!! (If you don't have Pages, this QuickOffice will also work)
I know this is a very round about way to view a '.docm' file. This is the only solution I have discovered so far. I hope in the near future Apple will add this type of file to be viewed natively in the iOS. If anyone out there comes up with a better solution, please post it here.
Note: I have tested this with Noteability and GoodReader and it DOES NOT work with these apps.