What boot ROM version should I have on an iMac17,1 runnung macOS Catalina 10.15.4 ?

Question

What boot ROM version should I have on an iMac17,1 runnung macOS Catalina 10.15.4 ?

Thanks...

iMac 27", macOS 10.15

Posted on Mar 28, 2020 5:35 PM

Reply

Answer 1

Mar 29, 2020 6:33 AM in response to And_the_answer_is

And_the_answer_is wrote:

What boot ROM version should I have on an iMac17,1 runnung macOS Catalina 10.15.4 ?

Thanks...

Are you having an issue, if so state what it is (?)

Apple no longer’t provides an official list of the current EFI firmware versions which should be installed on each model of Mac.

you can read more:

https://eclecticlight.co/2018/10/31/which-efi-firmware-should-your-mac-be-using-version-3/

However, If you want to dig deeper you can use a third party software:

LockRattler version 4.22 is available from here: lockrattler422

Reply

Answer 2

Mar 29, 2020 11:52 AM in response to leroydouglas

That's the problem isn't it? I don't know what the correct version is for this computer. On this computer it's 170.0.0.0 on others it's 173.0.0.0 and on others it's 176.0.0.0. Which is correct? If this information is available I'd appreciate a link.

This discussion at Howard's electriclight.co site has come together in his March 25, 2020 page: Do you have an iMac Retina 5K 27-inch Late 2015? (iMac17,1)

LockRattler is still available (ver4.24) but SilentKnight (ver 1.6) is: "A replacement for LockRattler to perform its assessments and check whether your Mac is up to date automatically." https://eclecticlight.co/lockrattler-systhist/

Reply

Answer 3

Apr 30, 2020 5:24 PM in response to Old Toad

Instead of rehashing it here please see this discussion at Howard's electriclight.co site: Do you have an iMac Retina 5K 27-inch Late 2015? (iMac17,1) .

The question was: What boot ROM version should be on an iMac17,1 running macOS Catalina 10.15.4?

Anyone?

Thanks...

Reply

Answer 4

dialabrain

Level 10

124,325 points

Apr 30, 2020 1:06 PM in response to And_the_answer_is

Mine is on 176.0.0.0.0

Reply

Answer 5

Old Toad

Level 10

210,189 points

Apr 30, 2020 2:15 PM in response to And_the_answer_is

Download and run SilentKnight from the Electric Light Company website and it will tell you what Firmware you have installed and can install any needed firmware including XProtect, Gatekeeper, etc.