Is YubiKey Security Key C good for a 2018 iMac?

i have a 9th and 11th gen, and an air m3 ipads, along with an 2018 imac & 2024 m4 mac mini (for plex only). i use the ipads at least 75% of the time. i already have the yubikey 5ci (not used yet) for the ipads and wonder if a security key c (link below) is a good choice for my 2nd key, to use with the imac. i’m just a basic user on the imac. i’m new at this, so ask if you need more info to advise.

https://www.amazon.com/gp/product/B0BVNRXFHT/ref=ox_sc_act_title_1?smid=A3PIGE6HBK2LA8&psc=1

iMac (2017 – 2020)

Posted on Feb 14, 2026 11:16 PM

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7 replies

Feb 16, 2026 2:51 PM in response to Grant Bennet-Alder

can you give a brief explanation of turning on two factor authentication with apple? i’ve always declined turning it on thinking it would be a pain, because i thought every time i need to login, i’d have to go get another ipad or my phone to verify in some way. i have a smart phone but rarely have it next to me or even turned on. i just don’t enjoy staring into a phone all day like so many. is it as simple as doing it one time per device and do i get the verification number from my google authenticator app, which is on the ipad? it’s posts like the one quoted below in an apple 2fa youtube video, that scare me!


“Apple - making easy things unnecessary complicated. Like reactivating my apple ID ten times a year. What a PITA. Sometimes I get an option to just have an email sent with a click link and sometimes 1 am in a loop of "no active ID", "Please reset your PWD" and "cannot reset PWD because ID is not active" shyte.”


but, then another comment post makes it sound simple.


“Apple's two-factor authentication works so smoothly that I haven't noticed that I've been using it for a long time. You don't have to open up an authentication App or your Messages App, it's just a pop-up.”


Feb 16, 2026 2:57 PM in response to rb5505

Two-factor authentication its not that awfully onerous. You likely already do something similar with some websites:


Two-factor authentication (2FA) on a Mac adds an extra layer of security to your Apple Account by requiring not only your password but also a six-digit verification code sent to your trusted device. To enable it, go to System Settings, click on your name, select Sign-In & Security, and turn on Two-Factor Authentication.


My take:

Once implemented, my subjective impression is that I am asked to re-verify Apple-ID FAR less often than before. I resisted enabling it for a long time. But I have NOT found it problematic at all..



Feb 16, 2026 3:46 PM in response to rb5505

YOU specify what is your trusted device.


I think you can also specify multiple trusted devices, and it will send to all, any one of which must be used to complete that login to your Apple-ID/Apple-Account.


check the last section in this article, "get a verification Code":


Use two-factor authentication for Apple Account security on your Mac - Apple Support




Is YubiKey Security Key C good for a 2018 iMac?

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