Temporarily disable gatekeeper

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Temporarily disable gatekeeper

I am trying to create a bootable installer for a 2009 iMac. It used to have High Sierra installed installed, but it was in my son's possession and somehow the OS has been wiped clean. I want to re-install High Sierra from a bootable flash drive. I tried downloading it on another iMac using the AppStore, but I got an error message that said Gatekeeper was preventing it from downloading. I am using Catalina and want to know if I can temporarily disable Gatekeeper.

iMac 27″, macOS 10.13

Posted on Jan 12, 2023 1:52 PM

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Answer 1

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BDAqua

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250,253 points

Jan 12, 2023 2:05 PM in response to onilvehs

The steps to disable Gatekeeper are as follows:

Step 1: Open Terminal quickly by pressing Command Space and then find Terminal.

Step 2: Type in the Terminal command line below to request disable Gatekeeper on Mac.

sudo spctl --master-disable

Step 3: Enter the user password on your Macbook. Note that it will not display the password when you enter it. Just enter it and press Enter. And the password is correct, and then Terminal will return the result like the picture.

Step 4: Check if Gatekeeper has been disabled successfully by typing the command below and pressing Enter.

spctl --status

When Terminal returns assessments disabled, you have successfully disabled Gatekeeper.

To re-enable Gatekeeper, you also open Terminal as instructed above. Then enter this command line to request to enable Gatekeeper.

sudo spctl --master-enable

How to disable Gatekeeper and SIP on Mac 2023 | Lucid Gen

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Answer 2

onilvehs Author

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Jan 12, 2023 6:21 PM in response to BDAqua

Another question. I've created a bootable disk on a flash drive for re-installing High Sierra. When it comes time to select the drive for installation, all I see is the flash drive disk...which says "this disk it is locked."

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Answer 3

BDAqua

Level 10

250,253 points

Jan 13, 2023 8:41 AM in response to onilvehs

Right, you cannot install too that, you ned another external drive or find out what's up with your internal Drive.

If you see a Utilities menu up above, run Disk Utility, does it show other drives? If so what format?

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Answer 4

onilvehs Author

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Jan 12, 2023 4:20 PM in response to BDAqua

Thank you.

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Answer 5

BDAqua

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Jan 12, 2023 4:24 PM in response to onilvehs

You're welcome, take care my friend.

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Answer 6

onilvehs Author

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Jan 13, 2023 9:07 AM in response to BDAqua

I have a feeling the hard drive is damaged. The only internal drive I see is the one labeled ST_M13FQ. I tried using Disk Utility to erase/format it but it says it can't be erased or repaired.

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Answer 7

BDAqua

Level 10

250,253 points

Jan 13, 2023 9:27 AM in response to onilvehs

Highlight there top entry there & choose View > Show All Devices.

Base System is firmware for Restore mode.

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Temporarily disable gatekeeper

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