Startup Items Are Killing Your Boot Time - Here’s How To Audit Them

A Mac that once started quickly can gradually become frustratingly slow.

You press the power button, enter your password and then wait while menu-bar icons appear one by one, applications launch themselves and the system becomes usable several minutes later.

The Mac itself may not be faulty. The problem is often the growing collection of applications, background services and system extensions configured to start automatically.

Some startup items are useful. Security software, backup tools and device-management agents may need to run from the moment you sign in. Others provide little value while consuming memory, processor time and network bandwidth every time the Mac starts.

This guide explains how startup items affect performance, how to audit them safely and what to avoid disabling on a business Mac.

What Are Startup Items?

Startup items are applications and services that launch automatically when your Mac starts or when you sign in.

On modern versions of macOS, these are mainly divided into two categories:

Open at Login

These are applications that visibly open after you sign in.

Examples might include:

• Microsoft Teams
• Slack
• Spotify
• Dropbox
• OneDrive
• Outlook
• Adobe Creative Cloud
• Password managers
• Printer utilities

You will often see their windows or icons shortly after reaching the desktop.

Allow in the Background

These are applications and helper services that can operate even when their main application is not open.

They may:

• Check for software updates
• Synchronise files
• Monitor security events
• Manage connected hardware
• Maintain VPN connections
• Back up data
• Display notifications
• Communicate with cloud services

Background items are less visible, but they can still affect startup time and general performance.

Why Do Startup Items Slow Down a Mac?

When several applications launch at once, they compete for the same resources.

Each application may need to:

• Read files from storage
• Load supporting services
• Connect to the internet
• Check for updates
• Authenticate an account
• Synchronise cloud data
• Scan folders
• Create menu-bar icons
• Restore previously opened windows

One application may add only a few seconds. Ten or fifteen applications launching together can make the Mac feel unresponsive for several minutes.

The effect is often worse on:

• Older Macs
• Macs with limited memory
• Macs with nearly full storage
• Intel-based Macs
• Devices using slow external drives
• Macs running several cloud-sync platforms
• Business devices with multiple security agents
• Macs that have been upgraded repeatedly over several years

A long startup time is rarely caused by one dramatic problem. It is often the cumulative effect of many small services.

First, Measure the Problem

Before changing anything, establish what “slow” means.

Restart the Mac and record:

• How long it takes to reach the login screen
• How long it takes to reach the desktop
• How long before applications respond normally
• Which applications open automatically
• Which menu-bar icons appear
• Whether the fans become loud
• Whether the Mac becomes hot
• Whether storage or network activity remains high

Do not judge startup time only by the appearance of the desktop.

The desktop may appear quickly while background applications continue loading for several minutes.

A useful measurement is the time from pressing the power button until you can open an application and use it without delays.

How to Review Login Items

On a current version of macOS, go to:

System Settings > General > Login Items & Extensions

You should see sections including:

• Open at Login
• Allow in the Background
• Extensions

This area provides the clearest overview of software configured to run automatically.

Audit “Open at Login”

Start with the visible applications listed under Open at Login.

Ask three questions about each item:

1. Do I use this application every working day?
2. Does it need to be open immediately after login?
3. Would anything important stop working if I opened it manually later?

If the answer to the second question is no, remove it from the list.

Select the application and use the minus button to prevent it from opening automatically.

This does not uninstall the application. It simply means you will open it manually when needed.

Good Candidates to Remove

Applications that usually do not need to launch automatically include:

• Music and video applications
• Game launchers
• Meeting software used occasionally
• Creative applications
• Printer-management utilities
• Vendor update tools
• Old cloud-storage applications
• Screenshot tools
• Unused menu-bar utilities
• Applications left behind by old hardware

For example, Microsoft Teams may be essential for one user but unnecessary at startup for someone who joins only an occasional meeting.

The goal is not to disable everything. It is to remove automatic launches that provide no immediate benefit.

Review “Allow in the Background”

Background items require more care.

Some are optional helpers. Others protect the Mac or keep business data available.

Before disabling one, identify which application installed it and what it does.

Background items may belong to:

• Antivirus or endpoint protection
• Backup software
• OneDrive or Dropbox
• Remote support tools
• VPN applications
• Password managers
• Device-management software
• Printer or scanner drivers
• Audio interfaces
• Docking stations
• Display-management tools
• Software update agents

Disabling the wrong item may stop backups, security monitoring or cloud synchronisation.

On a business Mac, check with your IT provider before turning off anything you do not recognise.

Startup Items You Should Usually Leave Alone

Some startup services are essential or beneficial.

These commonly include:

Endpoint Protection

Business security software may need to load at startup to monitor threats, scan files and report security events.

Disabling it can leave the Mac unprotected and may breach company policy.

Backup Software

Backup agents must often run continuously so they can protect files automatically.

A backup system that is not running may fail silently.

Device Management

Managed business Macs may use background agents to apply settings, install updates and report compliance.

Removing or disabling these agents can interfere with support and security controls.

Cloud File Synchronisation

OneDrive, Dropbox and similar tools may need to start automatically when important business files are stored within them.

However, having several cloud-sync tools running simultaneously can significantly affect login performance.

Password Managers

A password manager may need a background component to support browser extensions and automatic filling.

VPN and Network Security Tools

Some organisations require network filtering or VPN software to run from login.

Do not disable these without understanding the security impact.

Check Application Settings Too

Removing an application from macOS Login Items may not always be enough.

Many applications have their own setting such as:

• Open at login
• Launch when I start my computer
• Start automatically
• Run in the background
• Keep application running after closing
• Start minimised

Open the application’s settings and disable its own automatic-start option.

Otherwise, the application may add itself back to Login Items during the next update or launch.

Review Menu-Bar Applications

The menu bar can reveal how many services are running.

Look at the icons near the top-right corner of the screen.

Every icon does not necessarily indicate a major performance issue, but a crowded menu bar often suggests that many utilities are active.

Ask whether each tool still serves a purpose.

Common examples include:

• Clipboard managers
• Screenshot tools
• Weather utilities
• CPU monitors
• Cleaning applications
• Window-management tools
• Audio controllers
• Display utilities
• Cloud-storage applications

Remove or disable tools you no longer use.

Avoid running several applications that perform the same function.

Check for Old or Duplicate Software

Macs used for several years often accumulate outdated services.

You may find:

• Two antivirus products
• Several VPN clients
• Old printer software
• Previous cloud-backup applications
• Drivers for hardware no longer used
• Multiple meeting applications
• Legacy Adobe helpers
• Old remote-support software
• Duplicate password managers

Duplicate services can increase startup time and may conflict with one another.

Uninstall unwanted applications using the developer’s official removal process where possible. Dragging the main application to the Bin may leave background helpers behind.

Use Activity Monitor After Login

Activity Monitor can help identify what is using resources after startup.

Open:

Applications > Utilities > Activity Monitor

Review the following tabs.

CPU

Sort by % CPU.

Look for applications or processes using a high percentage of processing power for an extended period.

A brief spike during login is normal. Constant high usage may indicate a stuck application, repeated update attempt or software problem.

Memory

Review Memory Pressure and the applications using the most memory.

A large number of startup applications can leave little memory available for the work you actually need to do.

When memory pressure becomes high, macOS relies more heavily on storage, making the system feel slower.

Disk

Look for applications reading or writing large amounts of data.

Cloud-sync tools, backup applications, search indexing and antivirus scans can all create heavy disk activity after login.

Network

Check whether an application is transferring significant amounts of data immediately after startup.

This may indicate synchronisation, software updates or backup activity.

Activity Monitor should be used to identify patterns, not to force-quit unfamiliar system processes at random.

Check Whether macOS Is Reopening Previous Applications

Sometimes the applications appearing after restart are not formal login items.

macOS may be reopening windows that were active before shutdown.

When restarting or shutting down, look for the option:

Reopen windows when logging back in

Untick it before restarting.

Also close unnecessary applications before shutting down.

This can make a significant difference when dozens of documents, browser tabs and applications are being restored automatically.

Review Browser Startup Behaviour

Web browsers can make login feel slow, especially when they restore a large previous session.

Check whether Safari, Chrome, Edge or Firefox is configured to reopen:

• Every previous window
• Hundreds of tabs
• Several user profiles
• Web applications
• Background extensions

Review browser extensions and remove those you no longer use.

Some browsers can continue running background applications even after the visible window has closed. Disable that behaviour unless it is required.

Do Not Ignore Storage Space

Startup items are often blamed when the real problem is a nearly full drive.

Go to:

System Settings > General > Storage

A Mac needs free space for:

• Virtual memory
• Temporary files
• Application caches
• Updates
• Search indexing
• Cloud synchronisation
• Normal system operation

Aim to keep approximately 10% to 20% of the startup drive free.

Removing unnecessary startup applications can help, but it will not fully resolve poor performance if the internal storage is almost full.

Restart After Making Changes

Once you have disabled unnecessary items, restart the Mac.

Measure the boot and login time again using the same method as before.

Compare:

• Time to the login screen
• Time to the desktop
• Time until the Mac becomes responsive
• Number of automatically opened applications
• CPU and memory usage after login
• Fan noise
• Cloud-sync activity

This confirms whether the changes made a measurable difference.

Audit Items Gradually

Do not disable everything at once.

A better approach is to remove a small group of non-essential items, restart and test.

This makes it easier to identify:

• Which item caused the slowdown
• Whether an important function stopped working
• Whether an application adds itself back
• Whether the improvement was significant

Keep a note of what you change so it can be reversed if necessary.

What If Login Items Keep Returning?

Applications may re-add themselves for several reasons.

These include:

• An automatic-start setting inside the application
• A software update reinstalling the helper
• A company policy enforcing the application
• An incomplete uninstall
• A launch agent stored elsewhere in macOS
• Device-management software redeploying it

If an item belongs to business security or management software, it may be intentionally enforced.

If it belongs to an unwanted application, uninstall the application fully rather than repeatedly switching off its helper.

Advanced Locations Used by Startup Software

Older or more complex applications may use launch agents and launch daemons.

These can be stored in locations including:

• ~/Library/LaunchAgents
• /Library/LaunchAgents
• /Library/LaunchDaemons

These folders may contain configuration files that tell macOS to start background processes.

Do not delete files from these locations unless you understand exactly which application created them.

Removing the wrong file can stop software working, prevent backups or interfere with system functions.

Use the application’s official uninstaller or ask an IT professional to review suspicious entries.

What About “Cleaner” Applications?

Be cautious with applications claiming to improve startup speed automatically.

Some may provide a useful overview of login items, but others:

• Exaggerate problems
• Remove files without sufficient explanation
• Add their own background services
• Display alarming warnings
• Encourage unnecessary subscriptions
• Disable useful protections

macOS already includes the tools needed to review login and background items.

Third-party software should not be required for a basic startup audit.

Startup Items on Apple Silicon and Intel Macs

The basic audit process is similar on both platforms.

However, older Intel Macs may feel the effects more strongly because they often have:

• Slower processors
• Less efficient memory
• Older storage
• More legacy software
• Unsupported drivers
• Years of accumulated startup items

Apple silicon Macs are generally faster, but they can still become slow when overloaded with cloud-sync applications, browser helpers, security agents and menu-bar utilities.

A fast processor does not make unnecessary software free.

When Slow Startup Suggests a Bigger Problem

Startup items are only one possible cause.

Seek further diagnosis if the Mac remains slow after a careful audit, particularly when you also notice:

• Frequent freezes
• Unexpected restarts
• Kernel panics
• A flashing question-mark folder
• Disk Utility errors
• Excessive heat
• Loud fans
• Battery problems
• Missing internal storage
• Very slow file access
• Failure to install updates
• Long delays before the login screen appears

Login items normally affect the period after sign-in.

If the Mac is slow before the login screen appears, the cause may involve storage, hardware, firmware, encryption or macOS itself.

A Practical Startup-Item Audit Checklist

Keep

Retain applications that provide essential security, backup, device management, password management or required cloud synchronisation.

Disable From Login

Stop applications opening automatically when you do not need them immediately.

Remove

Uninstall old, duplicate, unsupported or unused software.

Test

Restart the Mac after each group of changes and compare startup performance.

Document

Record what was changed, particularly on business-owned devices.

Managing Startup Items Across a Business

Auditing one Mac is straightforward. Auditing dozens or hundreds requires a more organised approach.

Businesses should maintain a clear list of approved software and understand which applications are permitted to run at startup.

Centralised Mac management can help IT teams:

• Deploy approved applications
• Remove unwanted software
• Enforce security agents
• Monitor device performance
• Control extensions
• Standardise configurations
• Reduce duplicate tools
• Support remote users
• Plan hardware replacements

Without central management, different employees may install their own utilities, sync tools and browser extensions, leading to inconsistent performance and security.

How Hamilton Group Can Help

A slow Mac does not always need replacing.

In many cases, the problem can be traced to unnecessary startup applications, ageing software, limited storage or poorly configured background services.

Hamilton Group can help businesses audit their Macs, identify performance bottlenecks and ensure essential security and backup tools remain active.

Our team can assist with:

• Mac performance reviews
• Login-item and background-process audits
• Apple silicon and Intel support
• Software rationalisation
• Cloud-sync troubleshooting
• Endpoint security
• Device management
• macOS updates
• Hardware lifecycle planning
• Mixed Apple and Windows environments

To arrange a Mac performance review or discuss proactive IT support for your business, call Hamilton Group on 0330 043 0069 or visit hgmssp.com.