I've been trying to upgrade my Mac from High Sierra to Mojave, but I keep getting the error below.
I rang Apple support and they told me to wait a while and try downloading it again from the App Store. I've now done this 2 times and continue to get the same error.
I spoke with Apple again and they said to wait a while and try installing it again. It's now been two days and I've rebooted my Mac a number of times, and have attempted installation many times.
I also tried installing all other software updates in case that was a factor. They all updated fine without any problem. The only thing I can't do is get the Mojave installer to run because it is apparently "damaged".
Maybe this is the universe telling me not to upgrade and I should give up, but now I'm here to ask you good folk.
Can someone kindly suggest other options for me?
Best Answer
The first thing I would try is resetting the System Management Controller (SMC) of your Mac.
Since you don't specify the model of Mac it's not easy for me to set out the steps you need to take, so I refer you instead to this Apple Knowledge Base article: How to reset the System Management Controller (SMC) on your Mac.
Make sure you read through the article and follow the steps for your Mac carefully.