How to Speed up Mac Yosemite?

How to Speed up your Mac Running OS X Yosemite

Disable Transparency.
Check Activity Monitor to find out apps slowing your Mac.
Reduce Auto start applications.
Update: As pointed out in the comments, checking items just hides the app.
Restart your Mac.
Speed Up Finder.
Clean Your Desktop.
Free Up Disk Space.

How do I Speed up a Slow Mac?

Clean up system files and documents. A clean Mac is a fast Mac.
Detect & Kill Demanding Processes.
Speed up startup time: Manage startup programs.
Remove unused apps.
Run a macOS system update.
Upgrade your RAM.
Swap your HDD for an SSD.
Reduce Visual Effects.

Is MacOS Yosemite Still Good?

Yosemite remains the most technically spectacular manifestation of Apple's desktop OS ever, and now it's better than ever. It's a free update for anyone using a Mac made in 2008 or later (and some 2007 models), but (of course) it works best with recent hardware.

How do I Clean up my Mac Yosemite?

Step 1: Let go of the old files.
Step 2: Uninstall unused applications.
Step 3: Delete files related to uninstalled applications.
Step 4: Clean your Macs Startup Items.
Step 5: Check for Duplicate items and Remove them.
Step 6: Clean the desktop.
Step 7: Take softwares help.

Can you Upgrade from Yosemite to Sierra?

If you have macOS Sierra the current macOS version, you can upgrade straight to High Sierra without doing any other software installations. If you are running Lion version 10.7. 5, Mountain Lion, Mavericks, Yosemite, or El Capitan, you can upgrade directly from one of those versions to Sierra.

13 Tips to Optimize Your Mac After Yosemite Installation

1 Repair Permissions . This should be one of the things that you do before installing an upgrade to the OS as well as after.
2 Check Disk for Errors.
5 Reduce Transparency.
6 Disable FileVault.
7 Reduce Spotlight items.
13 Rollback to Mavericks.

Can Mac OS X 10.10 Yosemite be Upgraded?

Open System Preferences you can click on the Apple logo in the menu to find it. Click on Software Update. Your computer will check for updates, and show that an update is available for your Mac. Click on Upgrade Now to download the installer for the new version of macOS.