Free Safari porn blocker for Mac, and what else is free
There are genuinely free ways to block porn on a Mac, and a couple that pretend to be free and are not. Here are the ones that are actually free, what each covers, and where a Mac is harder to lock down than a phone.
Free option 1. Escape's Safari blocker on your Mac
Escape blocks adult sites in Safari on your Mac for free, the same 40,000+ site list it uses on your phone, plus any sites you add. The custom sites you block on your iPhone sync to your Mac over iCloud, so you set them once instead of rebuilding the list. There is no account and no second purchase to get the free Safari blocker on the Mac. The deeper blocking that covers other browsers is part of the premium tier, and one subscription covers all your devices. Escape is on the App Store.
Free option 2. macOS Screen Time
Built into every Mac, no download, no cost. Open System Settings, then Screen Time, then Content and Privacy, then Content Restrictions, and limit adult websites. It covers Safari well and, unlike a plain content blocker, resists Safari's reload-without-blockers option, which is what makes it the bypass-resistant layer. Set a Screen Time passcode that you do not hold yourself, the same idea as on a phone, so it is not a quick decision to turn off.
Free option 3. A free DNS filter
Some network-level filters have free tiers that cover personal use. A DNS filter sits in front of every app on the Mac, every browser included, which makes it the strongest single free layer for browsers beyond Safari. It takes a little setup. The trade-off is that a savvy person can change network settings, so pair it with a passcode held by someone else if you can.
What to skip
Be careful with "free" Mac blockers that are actually a short trial of a paid app, and with browser extensions that any user can remove in two clicks. An extension you can delete yourself is not really a block. The App Store or the app's own page shows the real pricing, so read it before you trust a "free" label.
The honest part about a Mac
A Mac is a more open machine than a phone, so any single free layer has more ways around it. That is a reason to stack a couple, not a reason to skip it. Escape's free Safari blocker plus Screen Time plus a passcode you do not hold covers most of it for nothing. For the full setup, see how to block porn on a Mac, and for the phone side, the iPhone guide.
Escape blocks porn in Safari for free, extends to every browser with Deep Block, and adds a 90-second urge ritual, practice games that retrain how you meet an urge, and 27 short courses on identity and the long arc of recovery. No account, no personal tracking.
More on this topic in Blocking porn on a Mac, or go deeper with the Your phone is the dealer course.