
You'll receive an email back with a new registration code (you re-use the same serial number).The institution name for your site license.The exact product name and version that you are using.If you want to keep the older version, send an email from your institutional email address to with the following information included:.The following instructions are only if you prefer to continue using an older version on the Mac. If you want to upgrade to the latest version, see the instructions.
CHEMDRAW ULTRA 14 SERIAL NUMBER
The Mac software and serial number are included on the same download page and same email message as PC users, but are marked as Mac. You will be emailed a new serial number and registration code which will be valid through the current license year.

CHEMDRAW ULTRA 14 INSTALL
You do not actually have to install the software if you already have version 14.0. This will set a new serial number and registration code for you.
CHEMDRAW ULTRA 14 SERIAL NUMBERS

If your software has already expired, you may upgrade to version 14 now or anytime, by re-downloading (and getting a new serial number) via SciStore: Site License Verification.If that fails (because you don't have an Internet connection) then you can activate by phone, fax, or email to receive an activation code. Click on Activate over the Internet to complete the activation.Reactivating will extend your current software's license for the next license year. You may either upgrade to version 14, or may keep version 13 by reactivating with your existing serial number. If your software has already expired, you will be immediately prompted to activate when you launch ChemDraw.The software will display a warning message one month before the previous expiration date, and you can close that window then click Activate on the Help menu.To reactivate, launch the ChemDraw application and click Activate on the Help menu then put in your serial number (it shows up automatically if you originally activated on the same machine).

You need to reactivate with your existing serial number. In order to maintain your working copy of ChemDraw Ultra, please follow the steps below.

Go to My Site Subscription (right hand side under Services).Older Version & Related Software Downloads.
