I thought I was 'bullet-proof' until recent events taught me otherwise.
I was upgrading OSX from Catalina > Sonoma (jury seems to be out re the Big Bang approach ...ie Catalina > Sonoma..or the more measured approach that I opted for Catalina > Monterey > Sonoma - a sort of halfway house. I already happened to have an older version of Monterey saved on my Mac. I'd then upgrade to whatever the latest version of Monterey was. Check it was OK then upgrade to Sonoma.
The instal of the older version of Monterey went OK and checked out - given a quick scrute.
Lesson 1 - the instal file is deleted. Bad news since it was over 12GB and downloading it was excruciatingly slow over a 10Mbps DSL line. Should have saved a copy elsewhere.
The Mac then automatically started to download the latest version of Monterey. I had hoped for a small incremental download but not to be. Another 12GB download and a 3 hour wait.
Lesson 2 - I should have downloaded the latest version in the first place and not faffed around with the older version already downloaded to my hard drive thinking I'd save time.
After the download of the latest version of Monterey, I don't recall if I had to start it or if it started automatically but .....
Lesson 3 - Ideally I would have squirrelled away a copy first given the chance
Then disaster struck
Part way through the upgrade of Monterey, the onscreen messages said " blah...blah...blah. Then your screen will go black for about a minute and then return.
It did go black but it didn't come back. I waited. And waited. After 30 mins plus, I was unsure what to do. Has it switched off ? If I hit the power switch to turn it back on..,what if it is still part way through the update and by pressing the power switch I turn the Mac off. Where would that leave the upgrade ?
So I called Apple support. We went through everything, concluded that there was nothing left to do other than hit the switch (after all I did have two separate tested backups of the Mac running Catalina). The result ? SFA. The Mac was dead. Totally. I booked an appointment to take it in to an Apple Store. I was not a happy bunny. First hardware failure in over 20 years using Apple.
Knock on effect
Lesson 4 - iCloud is a Godsend.
I have an iPad. That meant that I could still access all my files, photos etc and mail. Well, not quite.
Lesson 5 - Don't get clever with Mail.
I have created many mailboxes on my Mac and file incoming emails into them automatically using Rules in Mail. I have one for Screwfix, for example. The trouble with that approach is that it removes those mails from your Inbox. (I am using IMAP for emails and not POP3). That means you cannot access them from the iPad. You cannot access them - full stop. The only way is to recover your backup onto another Mac - I guess that is one very good reason to have another Mac with a massive drive (hard or SSD) - you can create another partiton into which you recover, reboot, get you mails. But what a faff.
Time Machine doesn't help either. I'm wondering if Smart mailbox is the way to go. We shall have to see. Meanwhile we have a Mac to fix.
Trying to fix the Mac - Day 2
There are a few key combinations to try when you have start-up problems. Many variations depending on type of Mac, laptop, Intel vs Apple chips. I tried all the combiations applicable to my Mac but no cigar. Dead as a Dodo. But then

I had been using my wireless keyboard. But what if there was no Bluetooth connection to the Mac ? I have a wired keyboard and so tried that. It's really tricky getting the timing right after or when you hit the power on button. But I persevered until suddenly


I got the Apple logo ....it works ! Halley-bloody-luyah
Lesson 6 - Always have a wired keyboard to fall back on. KISS
Hope you found that worth reading. All systems go this end.
I was upgrading OSX from Catalina > Sonoma (jury seems to be out re the Big Bang approach ...ie Catalina > Sonoma..or the more measured approach that I opted for Catalina > Monterey > Sonoma - a sort of halfway house. I already happened to have an older version of Monterey saved on my Mac. I'd then upgrade to whatever the latest version of Monterey was. Check it was OK then upgrade to Sonoma.
The instal of the older version of Monterey went OK and checked out - given a quick scrute.
Lesson 1 - the instal file is deleted. Bad news since it was over 12GB and downloading it was excruciatingly slow over a 10Mbps DSL line. Should have saved a copy elsewhere.
The Mac then automatically started to download the latest version of Monterey. I had hoped for a small incremental download but not to be. Another 12GB download and a 3 hour wait.
Lesson 2 - I should have downloaded the latest version in the first place and not faffed around with the older version already downloaded to my hard drive thinking I'd save time.
After the download of the latest version of Monterey, I don't recall if I had to start it or if it started automatically but .....
Lesson 3 - Ideally I would have squirrelled away a copy first given the chance
Then disaster struck
Part way through the upgrade of Monterey, the onscreen messages said " blah...blah...blah. Then your screen will go black for about a minute and then return.
It did go black but it didn't come back. I waited. And waited. After 30 mins plus, I was unsure what to do. Has it switched off ? If I hit the power switch to turn it back on..,what if it is still part way through the update and by pressing the power switch I turn the Mac off. Where would that leave the upgrade ?
So I called Apple support. We went through everything, concluded that there was nothing left to do other than hit the switch (after all I did have two separate tested backups of the Mac running Catalina). The result ? SFA. The Mac was dead. Totally. I booked an appointment to take it in to an Apple Store. I was not a happy bunny. First hardware failure in over 20 years using Apple.
Knock on effect
Lesson 4 - iCloud is a Godsend.
I have an iPad. That meant that I could still access all my files, photos etc and mail. Well, not quite.
Lesson 5 - Don't get clever with Mail.
I have created many mailboxes on my Mac and file incoming emails into them automatically using Rules in Mail. I have one for Screwfix, for example. The trouble with that approach is that it removes those mails from your Inbox. (I am using IMAP for emails and not POP3). That means you cannot access them from the iPad. You cannot access them - full stop. The only way is to recover your backup onto another Mac - I guess that is one very good reason to have another Mac with a massive drive (hard or SSD) - you can create another partiton into which you recover, reboot, get you mails. But what a faff.
Time Machine doesn't help either. I'm wondering if Smart mailbox is the way to go. We shall have to see. Meanwhile we have a Mac to fix.
Trying to fix the Mac - Day 2
There are a few key combinations to try when you have start-up problems. Many variations depending on type of Mac, laptop, Intel vs Apple chips. I tried all the combiations applicable to my Mac but no cigar. Dead as a Dodo. But then
I had been using my wireless keyboard. But what if there was no Bluetooth connection to the Mac ? I have a wired keyboard and so tried that. It's really tricky getting the timing right after or when you hit the power on button. But I persevered until suddenly
I got the Apple logo ....it works ! Halley-bloody-luyah
Lesson 6 - Always have a wired keyboard to fall back on. KISS
Hope you found that worth reading. All systems go this end.