We need a small database to handle approx 200 people, comprising volunteers and clients. It needs to be simple, free or inexpensive, accessible by several users some of whom have Apple computers. Any suggestions please?

For your needs, considering you require a simple, free or inexpensive database solution that can be accessed by users on various platforms including Apple computers, I recommend looking into the following options:

1. Microsoft Access: While it is not free, it is a part of the Microsoft Office suite, which many organizations already use. It allows you to create a simple database that can handle your requirements. However, it may not be the best choice if you need cross-platform access for Apple users.
2. Google Sheets: This is a free option that can serve as a simple database. You can create a spreadsheet to manage your volunteers and clients, and it allows for real-time collaboration among users. You can also use Google Forms to collect data and link it to your Google Sheets.
3. Airtable: This is a user-friendly database tool that offers a free tier. It allows you to create a simple database with linked records, which can help you manage your volunteers and clients effectively. Airtable is accessible via web browsers, making it compatible with Apple computers.
4. Microsoft PowerApps: Although not free, PowerApps is designed for building no-code business solutions and can be a good alternative to Access web apps. It allows you to create applications that can be accessed from various devices, including Apple products.
5. Zoho Creator: This is another low-code platform that allows you to build custom applications. It offers a free tier for small teams and is accessible from any device.

These options should help you transition from Excel to a more structured database solution while remaining accessible to your team members on different platforms.