This post by Digital Trends highlights some of the common issues and fixes with Mac OS X Mavericks.
- Get iPhoto working again in Mavericks
- Fix the slow Time Machine problem and make it run faster
- Reinstall Java after upgrading to Mavericks
- Make iCloud save your password
- Keep Mail from crashing
- Fix the constant Welcome to Mail message problem
- Fix the Time Machine Mavericks install issue
- Fix a buggy Menu Bar in OS X Mavericks
- Make iWork, iPhoto, iLife and other apps work in Mavericks
- Fix the ‘Contacts app not syncing’ problem
- Fix the Wi-Fi disconnect problem