How do you work on both Windows and Mac using git?

My unity project was created on Windows, and I have just bought a Mac. I transferred my project to the mac using git, but all of my script and prefab references were lost when I opened the project on the Mac. I then tried manually transferring the project using a .zip file and it worked just fine. I am wondering if I need to change something about my .gitignore file which I have included below:

 # =============== #
 # Unity generated #
 # =============== #
 Temp/
 Obj/
 UnityGenerated/
 Library/
  
 # ===================================== #
 # Visual Studio / MonoDevelop generated #
 # ===================================== #
 ExportedObj/
 *.svd
 *.userprefs
 *.csproj
 *.pidb
 *.suo
 *.sln
 *.user
 *.unityproj
 *.booproj
  
 # ============ #
 # OS generated #
 # ============ #
 .DS_Store
 .DS_Store?
 ._*
 .Spotlight-V100
 .Trashes
 Icon?
 ehthumbs.db
 Thumbs.db
 ehthumbs.db
 Thumbs.db
 *.meta