Andano wrote:
New iMac straight out of the box will not save Mail preferences.
Mail setup and import all worked OK.
Cannot save preferences, including:
• Downloads Folder destination
• Fonts & Colours > Message List font, Message Font etc.
• Choose Signature (within Compose)
When changes are made to preferences and the window is closed, those new preferences don't work. When the preferences window is re-opened, the preferences have reverted to default settings.
Help appreciated.
Uninstall all third party apps that are Cleaners/Optimizers/Anti-Virus/VPN
To trouble shoot further you can:
—Try a SafeBoot https://support.apple.com/en-us/HT201262
Takes noticeable longer to get to the login screen, does a 5-15 minute disk repair before it fully boots up, and certain system caches get cleared and rebuilt, including dynamic loader cache, etc.
Login and test. Reboot as normal and test as caches get rebuilt.
In Safe mode third party system modifications and system accelerations are disabled, it removes malware, etc hampering smooth operation, however a reboot will put it back to normal mode.
This test will tell you if third party interference; extensions etc are not loaded in safe boot mode.
—Test issue in another user (or guest user) account https://support.apple.com/en-us/HT204443
This will tell you if it a universal issue or isolated to your user/admin account.