Hi chris c-b,
We appreciate you reaching out to us. We understand that you are experiencing issues accessing your iCloud Drive files on your new computer.
We’d like to gather additional details that may help us be in a better position to assist you.
Are you using the same Apple ID for both Macs?
If no, we recommend that you sign in on the same Apple ID for both devices.
If yes, we recommend that you reach out to us here so we can take a closer look into the issue: Get Support
Also, we recommend that you check out the article below.
Set up iCloud Drive on all your devices
Take care!