Endpoint security is one of those areas where the right answer depends on the company.
There are a few ways to reduce endpoint risk, but the best strategy depends on risk appetite, company culture, operational maturity, and how security can support the organization without creating unnecessary friction.
The way I think about it is simple. A control is only valuable if it meaningfully reduces risk and can actually be operated at scale.
One of the strongest ways to reduce endpoint risk is to remove unnecessary local admin access. This applies across macOS, Windows, and Linux. If users do not need admin rights to do their job, removing that access reduces the ability to install unapproved software, change system settings, tamper with controls, or increase the blast radius if an account or device is compromised.
That said, not every organization can remove admin access from everyone. Some users have legitimate needs. Some teams need flexibility. Some companies have developer-heavy environments where removing admin access without a strong support model can create real friction.
When admin access cannot be fully removed, the next layer is controlling what can run on the endpoint.
The strongest version of this is a default-deny model, where only approved applications, binaries, scripts, packages, or publishers are allowed to execute. This can significantly reduce risk, especially in environments where users still have local admin rights.
The challenge is operational. Default-deny can be effective, but only if the company has a mature unblock process. Users need a clear way to request software, provide business justification, get a timely decision, and continue doing their jobs when there is a valid business need.
Without that process, the control can create too much friction. It can also lead to too many permanent exceptions, which weakens the value of the control over time.
If default-deny is not mature enough yet, a practical next step is to block known high-risk software categories. This may include unauthorized remote access tools, unapproved file-sharing applications, commodity offensive security tools, unsigned or untrusted binaries, and software that creates clear compliance or data exposure concerns.
This is not as strong as default-deny, but it is still meaningful risk reduction.
Hardening the endpoint is also critical. Endpoint management tooling should be used to enforce secure configurations, patching, disk encryption, firewall settings, browser controls, EDR coverage, vulnerability visibility, and baseline compliance.
Linux is where the conversation gets more complicated.
The concepts still apply to Linux, but the operating model is harder. I would not say Linux cannot be managed. It can. The issue is that many organizations do not have the same level of Linux endpoint management maturity that they have for macOS or Windows.
Linux fleets often vary by distribution, package manager, privilege model, developer workflow, and use case. Some Linux devices are user workstations. Some are engineering systems. Some are lab machines. Some are closer to servers than traditional endpoints.
So the real question is not whether the controls can work on Linux. They can. The question is whether the organization has the tooling and operating model to enforce them consistently without creating significant overhead.
If Linux does not have strong MDM or equivalent endpoint management, compensating controls become more important. That may include configuration management, package source governance, sudo controls, SSH controls, EDR, osquery, patch compliance, network segmentation, and posture-based access.
In some cases, limiting what a Linux endpoint can access may be more practical than trying to control every local action on the device.
User training also matters, but it should not be the primary control. Training can help users make better decisions, but the goal should be to reduce the number of risky decisions users have to make in the first place.
Code signing and notarization can also help, but they should be treated as trust signals, not guarantees. Signed software can still be risky. Approved software can still be abused. That is why application control, telemetry, exception governance, and response capability all need to work together.
The opportunity is in how the controls work together, not in any single one.
Removing admin access, default-deny, MDM, and EDR are all important, but none of them work well in isolation. The real strategy is understanding the company’s risk appetite, deciding how much friction the business can tolerate, and choosing controls that can actually be operated at scale.
Endpoint security is not about choosing the strictest possible control.
It is about choosing the strongest sustainable control for the business, then improving maturity over time.
That is where real risk reduction happens.