Question :
I recently bought an eBook in Apple’s Books.app on my iPhone. When I opened the Books.app on my iPad it automatically appeared there, but when I opened the Books.app on my Mac I didn’t appear…

How do I fix this ?

Answer :

There are various reasons why this problem may occur, but 99% of the time this problem can be fixed by doing one of the following (just start trying the first, then the second, etc.) :

-1- Make sure that iCloud sync is switched on for all devices

• on you iPhone, go to Settings.app
• in the Settings page, click on your own name (your personal avatar icon on the top)
• in the Apple ID page that opens, click on “iCloud”
• in the iCloud page that opens, click on “Show All”
• in the Apps using iCloud page that opens, scroll down and make sure that the switch at “Books” is switched ON (a green switch)
• then, swipe up the entire page to close the Settings.app
• then, on your iPad (if you have one), go to Settings.app
• in the Settings page, click on your own name (your personal avatar icon top left)
• in the Apple ID info that appears, click on “iCloud”
• in the iCloud info that appears, click on “Show All”
• in the Apps using iCloud info that appears, scroll down and make sure that the switch at “Books” is switched ON (a green switch)
• then, swipe up the entire page to close the Settings.app
• next, on your Mac, click on the Apple icon (top left in the menu bar)
• from the pulldown menu, choose “System Settings”
• in the window that appears, click on your own name (your personal avatar icon top left)
• in the Apple ID info that appears, click on “iCloud”
• in the iCloud info that appears, click on the “Show More Apps” button
• in the popup window that appears, scroll down and make sure that the switch at “Books” is turned ON (a dark grey switch)
• then click the “Done” button and close the Settings window by clicking on the small red button top left
• now, open the Books.app on all your devices and check if the eBooks you’ve purchased in Books.app are now available on all devices
  
  If that did not work, try this next solution :
  
  -2- Make sure that you are logged in to exactly the same iCloud-account on all devices
  
• on your iPhone, go to Settings.app
• in the Settings page, click on your own name (your personal avatar icon on the top)
• in the Apple ID page that opens, check that the iCloud-account that has purchased the eBook is showing
  if not : scroll down, click on “Sign Out”, follow the instructions and after logging out, log in now using the correct iCloud-account
• then, on your iPad (if you have one) go to Settings.app
• in the Settings page, click on your own name (your personal avatar icon top left)
• in the Apple ID info that appears, check that the iCloud-account that has purchased the eBook is showing
  if not : scroll down, click on “Sign Out”, follow the instructions and after logging out, log in now using the correct iCloud-account
• next, on your Mac, click on the Apple icon (top left in the menu bar)
• from the pulldown menu, choose “System Settings”
• in the window that appears, click on your own name (your personal avatar icon top left)
• in the Apple ID info that appears, check that the iCloud-account that has purchased the eBook is showing
  if not : scroll down, click the “Sign Out” button, follow the instructions and after logging out, log in now using the correct iCloud-account
  
  now, open the Books.app on all your devices and check if the eBooks you’ve purchased in Books.app are now available on all devices
  
  If that did not work (or not entirely, because the eBook is showing on your iPhone and iPad, but it isn’t showing on your Mac), try this next solution :
  
  -3- Manually download the purchased eBook to your Mac
  
• on your Mac, open the Books.app
• in the Books window that opens, click on your own name (your personal avatar icon bottom left)
• in the Account window that pops up, clcik on “Books”
• in the page that opens, make sure that the “All” button is clicked, then click on “Recent Purchases”
• in the “Recent Purchases” page that opens, find the eBook you are looking for and click on the “Cloud download”-icon next to the eBook’s cover picture
• now the icon will start spinning and the eBook will appear in Books.app’s library
  
  That’s it !
  
  enjoy 😉