macOS 26.4 Introduces New Security Feature for Terminal Commands

Wednesday March 25, 2026 1:24 pm PDT by Joe Rossignol

macOS Tahoe 26.4 introduces a new security feature that warns Mac users if they paste certain commands in the Terminal app that may be harmful.

macOS 26 and Terminal Feature
For those unaware, the Terminal app allows you to enter text commands to perform tasks on your Mac. Terminal is primarily intended for advanced users and developers, but unfortunately casual users can be tricked into entering harmful commands that can permanently delete files, change user permissions, and cause other problems.

Here is what the warning says when it appears:

Possible malware, Paste blocked

Your Mac has not been harmed.

Scammers often encourage pasting text into Terminal to try and harm your Mac or compromise your privacy.

These instructions are commonly offered via websites, chat agents, apps, files, or a phone call.

There is a "Paste Anyway" option if you wish to proceed.

The warning was spotted by users across Reddit and X over the past week.

Screenshot via "Mr. Macintosh"

We have yet to determine exactly which commands trigger the warning, which does not always appear. For this reason, always be careful. If you are unfamiliar with how Terminal works, it is probably best to avoid using it entirely.

macOS 26.4 was released earlier this week.

Related Roundup: macOS Tahoe

Tags: Apple Security, Terminal

Related Forum: macOS Tahoe

Popular Stories

apple lock security bug vulnerability fix privacy

Apple Still Working on Anti-Snatching Feature That Locks Stolen iPhones

Tuesday September 22, 2026 4:44 am PDT by Tim Hardwick

New references in the latest iOS 27.2 beta show that Apple continues to develop a new feature which will lock your iPhone if it's snatched from your hand by a thief. As previously reported, the feature will use the gyroscope, accelerometer, and other sensors to determine when an iPhone has been grabbed. It'll also rely on a paired Apple Watch to detect when the iPhone has suddenly moved...

• 60 comments

Verizon Will Charge $10 a Month for iPhone Handoff

Friday October 16, 2026 4:37 pm PDT by Juli Clover

Verizon plans to charge customers $10 per month for the iPhone Handoff feature that Apple added in iOS 27. iPhone Handoff allows one phone number to be shared across two separate iPhones. Pricing was included in Verizon's iPhone Duo announcement today, with the carrier confirming iPhone Handoff will work with the iPhone Duo and the iPhone 18 Pro models. Verizon will support iPhone Handoff,...

• 167 comments

Apple Now Inviting Media to October 28 'Launch Experience'

Thursday October 15, 2026 4:13 am PDT by Hartley Charlton

Apple has begun inviting selected members of the media to a product launch experience in Los Angeles on Wednesday, October 28, according to Bloomberg's Mark Gurman. In a post on X, Gurman described the gathering as an "all-day product launch experience" for touchscreen MacBooks, a new iPad mini, and Macs equipped with M6 chips. Gurman previously reported that Apple would introduce the...

• 89 comments

Top Rated Comments

klasma

7 months ago

It would be helpful if the dialog actually showed what is being pasted, so that the user could decide whether they want to “Paste Anyway”…

Since the clipboard can contain multiple contents with different mime types, and what exactly gets pasted depends on the receiving application, an accurate preview can be essential.

Score: 18 Votes (Like | Disagree)

!!!

7 months ago

We have yet to determine exactly which commands trigger the warning

Presumably anything containing [ICODE]curl[/ICODE] and/or a URL.

I'm sure some will complain but I think this is a great feature

It's annoying when you know what you're doing and these "security" features get in your way. I understand the vast majority of users don't understand terminal, but that doesn't mean you need to harm my experience.

Maybe one awesome optimization would be right click → Paste should just do it

Not really a good idea, I've found it's far more likely that the basic computer user uses right-click for copying and pasting. App launches are different as most people double-click.

Score: 13 Votes (Like | Disagree)

Starfia

7 months ago

Reactions:

• Seemingly well-intended to protect users.

• What happens when you know you know what you're doing? Is this going to bother you once in a while anyway?

• What kind of a Mac alert title is "Possible malware, Paste blocked"? A comma splice with incorrect capitalization?

Score: 12 Votes (Like | Disagree)

twistedpixel8

7 months ago

I'm sure some will complain but I think this is a great feature

Who would complain?! Probably the same people who complain about being forced to wear a seatbelt.

“Wall lickers”, we call them in Scotland.

Score: 10 Votes (Like | Disagree)

th0masp

7 months ago

How about making these extra safety steps optional but default - and let the user toggle them in system preferences?

Would be nice to have some choice back instead of having to deal with pop-ups and sometimes totally misleading error messages in this current state of OS affairs (like the one that calls certain downloaded installer files broken when they are merely unsigned and not coming from the Appstore).

Not everybody grew up glued to an iPad FFS. 🤪

Score: 9 Votes (Like | Disagree)