This article will help you downgrade from any version of the Mac operating system to an older version - so if you are looking to downgrade from Catalina, Mojave, High Sierra, Sierra, El Capitan.
Is it possible to uninstall and reinstall the Mail app without reinstalling the entire OS?
Sorry, but no.
Have you tried either rebuilding the particular email account that is having the issue or rebuilding the entire message database?
- A new feature in OS X El Capitan lets you skip the trash when deleting files from the Finder. It's a relatively easy process. Open a Finder window.
- The manual method described below is perfectly applicable not only to Mac OS X El Capitan but also to macOS High Sierra and even OS X Yosemite. To uninstall an app, do the following: Start by opening the Applications folder; Locate a necessary app; Right click on it and select the Move to Trash option from a drop-down menu.
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To rebuild a single or multiple Apple Mail mailboxes:
- Open the Mail app, and then, select one or more mailboxes.
- From the Mail app's menu bar, select Mailbox > Rebuild
To rebuild the Mail app message database:
- Quit Mail (if running)
- In Finder, navigate to:~/Library/Mail/V3/MailData
- Drag the following three files to the Trash:
- Envelope Index
- Envelope Index-shm
- Envelope index-wal
- Relaunch the Mail app.
My MacBook Air is running a 120GB SSD drive so I don’t want my hard drive full of excess things I don’t need. I just noticed after El Capitan that I lost a lot of space. I only had 10GB free. To run well a mac hard disk needs at least 20% free. Here’s how I freed up some more space.
I ran Disc Inventory X to see where the excess space was taken.
1. Remove old iPhoto library.
Look at this screenshot from Disk Inventory X: The pink section surrounded by the yellow line is my old ‘iphoto’ library. The large turquoise section to the left is the new ‘Photos’ library. El Capitan came with a new app called ‘Photos.’ The new Photos app imported my old iPhoto library, but it didn’t delete it! They are the same photos, the entire library has been duplicated. Deleting my old iPhoto library released almost 7 G of space!
To find the file just right click on the box and select ‘reveal in finder’:
This took me to the following folder:
I just dragged this to the trash and saved 6.6GB.
While I was at it I went to my ‘Applications’ folder and deleted the old ‘iphoto’ app which took up 1.7GB.
I could do this pretty confidently because my macbook air is my second machine, all my photo’s are only home computer if anything goes wrong.
2. Gmail ‘All Mail’
This huge multicoloured box turns out to be the Gmail ‘All Mail’
I discovered 15GB of gmail data in Apple Mail. Yes Apple mail now by default seems to download the gmail ‘All Mail’ folder which included every email you’ve ever deleted on gmail. The ‘All mail’ folder had over 17,000 emails in it. No wonder my internet usage was high last month – my laptop must have downloaded the entire 15GB of emails from gmail.
Thankfully it was a simple fix.
Here’s how to disable the ‘All mail’ folder from being downloaded to your Macintosh.
Go into Gmail.com, then go to Settings on the top right menu, then under the ‘Labels’ tab I changed ‘All Mail’ to ‘Hide’
I still needed to delete the files from the hard disk manually.
How To Delete Apps From Laptop
I am using OSX El Capitan, and Mail version 9.1. I am not sure what other versions of mail have this problem.
Other items…
How To Delete An App From Mac El Capitan Dmg
The were some other files I found with Disk Inventory X, (Old installers, old apps, some movies) and when I deleted them all in total I recovered 30GB!