I am using a very old iMac, the OS is X Yosemite 10.10.5. I am getting message to upgrade the OS and when trying not getting an option to upgrade. Please share the steps to upgrade and anything that I should do prior to OS upgrade.
Thank You
Amit
iMac 21.5", OS X 10.10
You can upgrade to High Sierra:
Before upgrading:
1. Backup. Anything can happen at any time,, so you should always keep a good backup. Make a bootable clone SuperDuper! or CarbonCopy Cloner or use TimeMachine.
2. Run Disk Utility > First Aid from your Recovery Partition
3. If you have issues on your present system don't compound them by installing over them. Solve them first then upgrade.
4 Check HDD for free space. At least 8.8GB of available storage. Preferably much more.
5. Check your applications for compatibility here…http://roaringapps.com/apps.
6. Disconnect all peripherals, including USB hubs.
7. After downloading the installer, it will be in /Applications folder. Duplicate it and then drag the copy it to another locations like Downloads, if you want to save the installer.
8. Be patient, the download takes a long time and the install may look like it has died at times. Ignore it.
9. If you have any doubts about upgrading, install the new upgrade on an external disk and test drive it first.
You can upgrade to High Sierra:
Before upgrading:
1. Backup. Anything can happen at any time,, so you should always keep a good backup. Make a bootable clone SuperDuper! or CarbonCopy Cloner or use TimeMachine.
2. Run Disk Utility > First Aid from your Recovery Partition
3. If you have issues on your present system don't compound them by installing over them. Solve them first then upgrade.
4 Check HDD for free space. At least 8.8GB of available storage. Preferably much more.
5. Check your applications for compatibility here…http://roaringapps.com/apps.
6. Disconnect all peripherals, including USB hubs.
7. After downloading the installer, it will be in /Applications folder. Duplicate it and then drag the copy it to another locations like Downloads, if you want to save the installer.
8. Be patient, the download takes a long time and the install may look like it has died at times. Ignore it.
9. If you have any doubts about upgrading, install the new upgrade on an external disk and test drive it first.
Which OS you can upgrade to depends on the date and model of your Mac. Please go to Apple menu > About this Mac and post the information there, everything except the serial number.
iMac (21.5 Inch, Mid 2011)
Processor 2.8 G Hz Intel Core i7
Startup Desk Machintosh HD
OS X Yosemite version 10.10.5
High Sierra is as high as it can go.
OS Upgrade
