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 won’t update, the steps you can try yourself, and when it’s time to get professional on‑site help. It applies to:
• MacBook Air
• MacBook Pro
• iMac
• Mac mini
• Mac Studio
If your Mac refuses to install updates, gets stuck during installation, or shows errors when downloading macOS, this page is for you.
The most common reasons a Mac won’t update
These are the issues that Keith Thomas identifies most often during on‑site visits:
• Not enough free disk space
• Slow or unstable internet connection
• Apple ID or iCloud issues
• Damaged system files
• macOS installer corruption
• Outdated or incompatible apps blocking the update
• Startup volume errors
• Security settings preventing installation
Quick checks you can do yourself
These steps solve around 50% of macOS update issues.
Check 1 – Restart the Mac
A restart clears temporary files and resets update processes.
Check 2 – Check free disk space
Go to Apple menu → About This Mac → Storage. Aim for at least 20GB free.
Check 3 – Check your internet connection
Updates require a stable connection. Restart your router if needed.
Check 4 – Sign out and back into your Apple ID
Go to System Settings → Apple ID → Sign Out → Sign In.
If your Mac won’t download the update
This usually means:
• Internet connection issues
• Apple ID authentication problems
• macOS installer corruption
Try:
• Restarting the Mac
• Restarting your router
• Downloading the update again
If your Mac gets stuck during installation
This usually means:
• Low disk space
• Startup volume errors
• Damaged system files
Try:
• Restarting the Mac
• Booting into macOS Recovery
• Running Disk Utility First Aid
• Reinstalling macOS without erasing data
If your Mac shows an update error
Common errors include:
• “An error occurred while installing macOS”
• “Not enough free space”
• “Unable to verify update”
• “Update failed to prepare”
These usually mean:
• Damaged installer
• Disk errors
• Apple ID issues
Try:
• Downloading the update again
• Running Disk Utility
• Restarting the Mac
When DIY stops working
You should get on‑site help if:
• The update fails repeatedly
• The Mac gets stuck during installation
• Disk Utility shows errors
• macOS Recovery won’t load
• You need your data preserved
These issues usually require:
• Startup volume repair
• macOS recovery
• Data‑safe macOS reinstall
• Apple ID and iCloud diagnostics
• Installer repair
On‑Site Apple Mac Support – London & South East UK
If your Mac won’t update, 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:
• macOS update failures
• Data‑safe macOS recovery
• macOS reinstall and repair
• iCloud and Apple Account issues
• New Mac setup and migration
• Startup volume and installer issues
Book on‑site help in London and the South East UK
If your Mac won’t update, 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