I have kind of the same problem. I’m running MacOS Big Sur 11.5.2. I did download with the product manager. EZdrummer did install fine, but Metal Machine EZX,Rock EZX and all drum midi packs I bought do not.
The installer is 32 bit and won’t run. I openend the DMG file that was downloaded where it showed the installer can’t be run.
Could you please update these software packages too?Thank you
EZdrummer version: 2.2.1
Operating system: macOS Big Sur (11)
What happens when you go into Product Manager > Metal Machine EZX > Show Details > Install
Mac Studio M1 Max, RAM 64 GB, 1TB Drive, OSX 12.x/13.x and Windows 10 (VM)
DAW: Studio One Pro (always up to date)
DTX Express III (Extreme triggers), Nektar LX88
OWC Thunderbay Mini (4 X 1TB Sata SSD), Express 4M2 (4 X 2TB M.2 SSD), Envoy Express (1TB M.2 SSD)
Presonus Quantum, Faderport & Faderport 8
Black Lion Sparrow Mk2 A/D, FMR-RNP-RNC, MIDI Xpress 128, BM5A, KRK VXT4, Equator D5
2020 Macbook Pro 16GB RAM, 512GB SSD Audio(mobile rig)
Thank you for replying.
Here are the steps after downloading with product manager:
Step 1: install product -> no go
Step 2: Click on more details. After that I downloaded the updates first. 
After this step I clicked on the hamburger menu and then install as requested.
Step 3: Installation info: 
Step 4: checked authorizations :
Step 5: clicked in the details screen on “open in finder”, next windows apears 
The updater shows that it cant install the product (because of 32 bit software).
regards, Andre
