Why Choose Keith Thomas
• 20 years of experience as a Senior Apple Support Specialist at Apple Computer UK HQ.
• Former Apple Computer UK Mac Support Specialist and Apple Authorised Service Provider background.
• Established and Independent since 2010 for on‑site Apple Support Service – no call centres, no outsourcing, no hardware repairs. Over 25,000+ Apple problems resolved. Unique on-site Apple Support Service. backed up with Independent Apple Telephone Support Assistance.
• Trusted by home users, small businesses, and professionals across London and the South East UK.• Clear, honest, software‑only support. No Hardware Repairs. Expert Apple Consultancy Service.
On‑site Apple Mac Support in London and the South East UK
What this page covers
This guide explains the real reasons a Mac cannot login to an email account, the steps you can try yourself, and when it’s time to get professional on‑site help. It applies to:
• Apple Mail
• Outlook for Mac
• Gmail, iCloud, Outlook.com, Yahoo and IMAP accounts
• Microsoft 365 and Exchange accounts
If your Mac keeps asking for your email password, shows “Account Error”, refuses to authenticate, or won’t add your email account at all, this page is for you.
The most common reasons a Mac cannot login to an email account
These are the issues that Keith Thomas identifies most often during on‑site visits:
• Incorrect password
• Two‑factor authentication issues
• App‑specific password required
• Microsoft 365 or Google security blocks
• Damaged Mail or Outlook preferences
• macOS keychain conflicts
• Server authentication problems
• Corrupted user account
Quick checks you can do yourself
These steps solve around 60% of login issues.
Check 1 – Restart the Mac
A restart resets Mail, Outlook and authentication services.
Check 2 – Check your password
Most login failures happen after password changes.
Check 3 – Approve login alerts
Google, Microsoft and Apple often require approval on another device.
Check 4 – Update macOS
Mail and authentication fixes are often included in macOS updates.
If Mail shows “Account Error”
This usually means:
• Incorrect password
• Authentication token expired
• Keychain conflict
Try:
• Re‑entering your password
• Removing old passwords from Keychain
• Restarting the Mac
If Outlook for Mac cannot login
This usually means:
• Microsoft 365 authentication issue
• Damaged Outlook profile
• Keychain conflict
Try:
• Signing out and back into your Microsoft account
• Restarting the Mac
• Updating Outlook
If Gmail will not login
This usually means:
• Google security block
• App permissions revoked
• Two‑factor authentication required
Try:
• Approving the login on your phone
• Checking Google Account security alerts
• Restarting the Mac
If iCloud Mail will not login
This usually means:
• Apple ID authentication issue
• iCloud Keychain conflict
• App‑specific password required
Try:
• Signing out and back into iCloud
• Restarting the Mac
• Checking Apple ID security settings
If login issues started after a macOS update
This usually means:
• Keychain reset
• Mail database reset
• Account re‑authentication required
Try:
• Re‑entering your email password
• Restarting the Mac
• Updating all apps
If login works on another user account
This usually means:
• Corrupted user account
• Damaged Mail or Outlook preferences
• Permissions issues
Try:
• Testing login on another user account
• Restarting the Mac
• Reinstalling macOS without erasing data
When DIY stops working
You should get on‑site help if:
• Your Mac refuses to login to your email account at all
• Password prompts keep returning
• macOS reinstall does not fix the issue
• Mail or Outlook crashes during login
• You need your data preserved
These issues usually require:
• Email account and authentication repair
• macOS recovery
• Data‑safe macOS reinstall
• User account repair
• Permissions and system file diagnostics
On‑Site Apple Mac Support – London & South East UK
If your Mac cannot login to your email account, Keith Thomas provides an often same‑day on‑site support service across:
• Central London
• West, North, South and East London
• Surrey
• Berkshire
• Hampshire
• Wiltshire
Keith Thomas is a Mac Support Specialist in:
• Email login and authentication issues
• Apple Mail and Outlook configuration
• macOS configuration repair
• Data‑safe macOS recovery
• macOS reinstall and repair
• New Mac setup and migration
• User account and permissions diagnostics
Book on‑site help in London and the South East UK
If your Mac cannot login to your email account, Keith Thomas can visit your home or office and get you working again.
Keith Thomas – Apple Mac Support Specialist
Established 2010 – Open 09:30–20:30, 7 Days
Contact Keith Thomas by Telephone: 07800 940756 or by Text to: 07800 940756, or simply complete an online website contact form 24/7