I installed the new version this morning and the message comes up "garages sale want to use your confidential information stored in GS pro account. – I put in my password and it is denied.
When you get this system prompt you just need to enter your macOS user password. Please note that you probably get multiple prompts which can be irritating.
Since GarageSale 9 uses a different application identifier, you’ll need to grant it access to each eBay token in your Mac’s keychain. When the system displays such a permission panel, please click the “Always Allow” button if available.